Alcobaça weather in May

In May, Alcobaça sees average daytime highs of 20°C and overnight lows near 13°C, with 57 mm of rain across 8 wet days and about 14.1 hours of daylight. It is the 6th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 19°C in the first days to 22°C by the end. The sky is clear or mostly clear about 40% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 36 min at the start of May to 14 h 36 min by month's end. Set against the rest of the year, May is Alcobaça's 5th-clearest and 4th-windiest month. For the whole year in context, see Alcobaça's year-round climate.

Daytime high: 20°; 6th warmest
Overnight low: 13°; 7th coldest
Rainfall: 57 mm; 8 wet days
Daylight: 14 h 12 min; 5:27 AM – 7:37 PM
Cloud cover: 49%; 5th clearest
Wind: 16 km/h; 4th windiest
Solar energy: 6.67 kWh/m²
Travel score: 6.8; out of 10

Alcobaça is city seat of Alcobaça municipality.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

← April Alcobaça year-round climate June →Best places to visit in May

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 19°C in the first days to 22°C by the end.

A typical May day in Alcobaça reaches about 20°C in the afternoon and slips back to 13°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 26°C. Set against its neighbours, May runs about 2°C warmer than April and about 3°C cooler than June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	19	19	19	19	19	19	19	19	20	20	20	20	20	20	20	20	21	21	21	21	21	21	21	21	21	22	22	22	22	22	22
Avg low (°C)	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	14	14

	Avg high (°C)	Avg low (°C)
1	19	12
2	19	12
3	19	12
4	19	12
5	19	12
6	19	12
7	19	12
8	19	12
9	20	13
10	20	13
11	20	13
12	20	13
13	20	13
14	20	13
15	20	13
16	20	13
17	21	13
18	21	13
19	21	13
20	21	13
21	21	14
22	21	14
23	21	14
24	21	14
25	21	14
26	22	14
27	22	14
28	22	14
29	22	14
30	22	14
31	22	14

Alcobaça weather by month

How May compares with the rest of the year at a glance. May is the 6th-warmest and 8th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	14° / 8°	79	10.3	9.5	3.9
Feb	15° / 9°	58	8.3	10.4	4.5
Mar	17° / 10°	62	9.3	11.7	5.6
Apr	18° / 11°	65	10.4	13	5.9
May	20° / 13°	57	8	14.1	6.8
Jun	23° / 15°	17	4.1	14.7	8.2
Jul	25° / 16°	7	2.3	14.5	8.8
Aug	25° / 17°	9	2	13.6	8.7
Sep	24° / 16°	38	5.4	12.3	8.0
Oct	21° / 14°	88	9.9	10.9	6.6
Nov	17° / 11°	90	11.4	9.8	5.2
Dec	14° / 9°	82	10.1	9.3	4.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	57	57	57	57	56	57	56	56	56	56	56	57	57	57	58	58	58	59	59	60	60	60	61	61	62	62	62	63	63	63	63
Cloudier (%)	43	43	43	43	44	43	44	44	44	44	44	43	43	43	42	42	42	41	41	40	40	40	39	39	38	38	38	37	37	37	37

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	56	44
6	57	43
7	56	44
8	56	44
9	56	44
10	56	44
11	56	44
12	57	43
13	57	43
14	57	43
15	58	42
16	58	42
17	58	42
18	59	41
19	59	41
20	60	40
21	60	40
22	60	40
23	61	39
24	61	39
25	62	38
26	62	38
27	62	38
28	63	37
29	63	37
30	63	37
31	63	37

Chance of precipitation in May

Any precipitation

Alcobaça gets around 57 mm of rain over 8 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 26% and peaks near 30% on the wettest days. The odds ease toward the end of the month.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	30	29	29	29	29	29	28	28	28	28	28	27	27	27	27	26	26	26	26	25	25	25	24	24	23	23	22	22	21	21	21

	Rain chance (%)
1	30
2	29
3	29
4	29
5	29
6	29
7	28
8	28
9	28
10	28
11	28
12	27
13	27
14	27
15	27
16	26
17	26
18	26
19	26
20	25
21	25
22	25
23	24
24	24
25	23
26	23
27	22
28	22
29	21
30	21
31	21

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, May lands in the dry band about 67% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	82	81	81	80	79	79	79	78	77	77	75	74	73	72	70	70	68	67	65	64	62	61	59	57	56	55	52	51	50	48	47
Comfortable (%)	18	19	19	19	20	20	20	21	22	22	23	24	25	26	27	27	28	29	30	31	32	33	35	36	37	38	40	41	42	43	45
Humid (%)	0	0	0	1	1	1	1	1	1	1	2	2	2	2	3	3	4	4	5	5	6	6	6	7	7	7	8	8	8	8	8

	Dry (%)	Comfortable (%)	Humid (%)
1	82	18	0
2	81	19	0
3	81	19	0
4	80	19	1
5	79	20	1
6	79	20	1
7	79	20	1
8	78	21	1
9	77	22	1
10	77	22	1
11	75	23	2
12	74	24	2
13	73	25	2
14	72	26	2
15	70	27	3
16	70	27	3
17	68	28	4
18	67	29	4
19	65	30	5
20	64	31	5
21	62	32	6
22	61	33	6
23	59	35	6
24	57	36	7
25	56	37	7
26	55	38	7
27	52	40	8
28	51	41	8
29	50	42	8
30	48	43	8
31	47	45	8

Wind in May

Winds average 16 km/h in May.

Across May, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	16	15	15	15	15	15	15	15	15	15	15	16	16
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	16	light breeze
2	16	light breeze
3	16	light breeze
4	16	light breeze
5	16	light breeze
6	16	light breeze
7	16	light breeze
8	16	light breeze
9	16	light breeze
10	16	light breeze
11	16	light breeze
12	16	light breeze
13	16	light breeze
14	16	light breeze
15	16	light breeze
16	16	light breeze
17	16	light breeze
18	16	light breeze
19	16	light breeze
20	15	light breeze
21	15	light breeze
22	15	light breeze
23	15	light breeze
24	15	light breeze
25	15	light breeze
26	15	light breeze
27	15	light breeze
28	15	light breeze
29	15	light breeze
30	16	light breeze
31	16	light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 36 min at the start of May to 14 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 60 minutes over May. Sunrise moves from 5:44 AM to 5:17 AM, and sunset from 7:22 PM to 7:50 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	13.6	13.7	13.7	13.8	13.8	13.8	13.9	13.9	13.9	14.0	14.0	14.0	14.1	14.1	14.1	14.2	14.2	14.2	14.3	14.3	14.3	14.3	14.4	14.4	14.4	14.4	14.5	14.5	14.5	14.5	14.6
Sunrise (AM)	5:44	5:43	5:41	5:40	5:39	5:38	5:36	5:35	5:34	5:33	5:32	5:31	5:30	5:29	5:28	5:27	5:26	5:25	5:24	5:24	5:23	5:22	5:21	5:21	5:20	5:19	5:19	5:18	5:18	5:17	5:17
Sunset (PM)	7:22	7:23	7:24	7:25	7:26	7:27	7:28	7:29	7:30	7:31	7:32	7:33	7:34	7:35	7:36	7:37	7:38	7:39	7:40	7:41	7:42	7:43	7:44	7:44	7:45	7:46	7:47	7:48	7:49	7:49	7:50

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	13.6	5:44	7:22
2	13.7	5:43	7:23
3	13.7	5:41	7:24
4	13.8	5:40	7:25
5	13.8	5:39	7:26
6	13.8	5:38	7:27
7	13.9	5:36	7:28
8	13.9	5:35	7:29
9	13.9	5:34	7:30
10	14.0	5:33	7:31
11	14.0	5:32	7:32
12	14.0	5:31	7:33
13	14.1	5:30	7:34
14	14.1	5:29	7:35
15	14.1	5:28	7:36
16	14.2	5:27	7:37
17	14.2	5:26	7:38
18	14.2	5:25	7:39
19	14.3	5:24	7:40
20	14.3	5:24	7:41
21	14.3	5:23	7:42
22	14.3	5:22	7:43
23	14.4	5:21	7:44
24	14.4	5:21	7:44
25	14.4	5:20	7:45
26	14.4	5:19	7:46
27	14.5	5:19	7:47
28	14.5	5:18	7:48
29	14.5	5:18	7:49
30	14.5	5:17	7:49
31	14.6	5:17	7:50

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.67 kWh/m².

For context, solar energy here swings from a low near 1.94 kWh/m² to a high of 7.45 kWh/m² in July across the year — May's 6.67 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	6.2	6.3	6.3	6.3	6.3	6.4	6.4	6.4	6.5	6.5	6.5	6.5	6.6	6.6	6.7	6.7	6.7	6.8	6.8	6.8	6.8	6.8	6.9	6.9	6.9	6.9	6.9	7.0	7.0	7.0	7.0
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	6.2	Intense
2	6.3	Intense
3	6.3	Intense
4	6.3	Intense
5	6.3	Intense
6	6.4	Intense
7	6.4	Intense
8	6.4	Intense
9	6.5	Intense
10	6.5	Intense
11	6.5	Intense
12	6.5	Intense
13	6.6	Intense
14	6.6	Intense
15	6.7	Intense
16	6.7	Intense
17	6.7	Intense
18	6.8	Intense
19	6.8	Intense
20	6.8	Intense
21	6.8	Intense
22	6.8	Intense
23	6.9	Intense
24	6.9	Intense
25	6.9	Intense
26	6.9	Intense
27	6.9	Intense
28	7.0	Intense
29	7.0	Intense
30	7.0	Intense
31	7.0	Intense

Planning a trip in May

Is May a good time to visit Alcobaça?

Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.8

Sightseeing

5th-best month of the year

3.8

Beach & pool

6th-best month of the year

May is a reasonable time to visit Alcobaça for sightseeing.

What to pack for Alcobaça in May

From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In May, Alcobaça sees daytime highs around 20°C and nights near 13°C. Pack sun protection. Worth having: rain gear. About 8 days see rain.

sun protectionrain gear

Sea temperature near Alcobaça in May

The nearest coast averages about 16°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in August at about 19°C and coldest in February near 14°C.

The water stays below 20°C all year — cool enough that most swimmers want a wetsuit.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sea temperature (°C)	15	14	14	15	16	18	18	19	19	18	17	15
Comfort	Bracing	Bracing	Bracing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool

	Sea temperature (°C)	Comfort
Jan	15	Bracing
Feb	14	Bracing
Mar	14	Bracing
Apr	15	Cool
May	16	Cool
Jun	18	Cool
Jul	18	Cool
Aug	19	Cool
Sep	19	Cool
Oct	18	Cool
Nov	17	Cool
Dec	15	Cool

UV index in Alcobaça in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Alcobaça peaks around July 14 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	6	7	7	9	9	8	6	5	2	2
Level	Low	Moderate	High	Very high	High	Very high	Very high	Very high	High	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	6	High
Apr	7	Very high
May	7	High
Jun	9	Very high
Jul	9	Very high
Aug	8	Very high
Sep	6	High
Oct	5	Moderate
Nov	2	Moderate
Dec	2	Low

Location & terrain

Where is Alcobaça?

Alcobaça sits at 39.6°N, 9.0°W, 38 m above sea level, in Portugal. The nearest listed city is Caldas da Rainha, 22 km away.

Topography around Alcobaça

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Alcobaça.

Within 3 km, the terrain around Alcobaça has only modest variations in elevation — a maximum elevation change of 177 m around an average of 87 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 611 m; within 80 km, large variations in elevation — a maximum elevation change of 865 m.

The land around Alcobaça is covered by trees (53%) and grassland (32%) within 3 km, trees (49%) and grassland (29%) within 16 km, and trees (38%), water (27%) and grassland (24%) within 80 km.

3 km

177 m

trees 53%

16 km

611 m

trees 49%

80 km

865 m

trees 38%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

← April Alcobaça year-round climate June →Best places to visit in May

May weather nearby: Caldas da Rainha 22 km · Marinha Grande 22 km · Monsanto 25 km · Leiria 26 km · Torres Novas 38 km · Peniche 41 km · Santarém 43 km · Entroncamento 45 km

Portugal travel facts

Travel advisory: Level 1; Exercise Normal Precautions
Power plugs: Type C / E / F; 230 V · 50 Hz
Prices: ≈ 60% of US; price level, 2025
GDP per capita: $32,082; 2025
Happiness: 6.0 / 10; World Happiness, 2025
Safe drinking water: 95%; of population, 2024
Homicide rate: 0.7; per 100k, 2022
Road deaths: 8.2; per 100k/yr, 2019
Income group: High; World Bank
English: Very high; EF EPI 612
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Alcobaça (39.5522°, -8.9775°, elevation 38 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).

	Avg high (°C)	Avg low (°C)
1	19	12
2	19	12
3	19	12
4	19	12
5	19	12
6	19	12
7	19	12
8	19	12
9	20	13
10	20	13
11	20	13
12	20	13
13	20	13
14	20	13
15	20	13
16	20	13
17	21	13
18	21	13
19	21	13
20	21	13
21	21	14
22	21	14
23	21	14
24	21	14
25	21	14
26	22	14
27	22	14
28	22	14
29	22	14
30	22	14
31	22	14

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	56	44
6	57	43
7	56	44
8	56	44
9	56	44
10	56	44
11	56	44
12	57	43
13	57	43
14	57	43
15	58	42
16	58	42
17	58	42
18	59	41
19	59	41
20	60	40
21	60	40
22	60	40
23	61	39
24	61	39
25	62	38
26	62	38
27	62	38
28	63	37
29	63	37
30	63	37
31	63	37

	Rain chance (%)
1	30
2	29
3	29
4	29
5	29
6	29
7	28
8	28
9	28
10	28
11	28
12	27
13	27
14	27
15	27
16	26
17	26
18	26
19	26
20	25
21	25
22	25
23	24
24	24
25	23
26	23
27	22
28	22
29	21
30	21
31	21

	Dry (%)	Comfortable (%)	Humid (%)
1	82	18	0
2	81	19	0
3	81	19	0
4	80	19	1
5	79	20	1
6	79	20	1
7	79	20	1
8	78	21	1
9	77	22	1
10	77	22	1
11	75	23	2
12	74	24	2
13	73	25	2
14	72	26	2
15	70	27	3
16	70	27	3
17	68	28	4
18	67	29	4
19	65	30	5
20	64	31	5
21	62	32	6
22	61	33	6
23	59	35	6
24	57	36	7
25	56	37	7
26	55	38	7
27	52	40	8
28	51	41	8
29	50	42	8
30	48	43	8
31	47	45	8

	Avg high (°C)	Avg low (°C)
1	19	12
2	19	12
3	19	12
4	19	12
5	19	12
6	19	12
7	19	12
8	19	12
9	20	13
10	20	13
11	20	13
12	20	13
13	20	13
14	20	13
15	20	13
16	20	13
17	21	13
18	21	13
19	21	13
20	21	13
21	21	14
22	21	14
23	21	14
24	21	14
25	21	14
26	22	14
27	22	14
28	22	14
29	22	14
30	22	14
31	22	14

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	56	44
6	57	43
7	56	44
8	56	44
9	56	44
10	56	44
11	56	44
12	57	43
13	57	43
14	57	43
15	58	42
16	58	42
17	58	42
18	59	41
19	59	41
20	60	40
21	60	40
22	60	40
23	61	39
24	61	39
25	62	38
26	62	38
27	62	38
28	63	37
29	63	37
30	63	37
31	63	37

	Rain chance (%)
1	30
2	29
3	29
4	29
5	29
6	29
7	28
8	28
9	28
10	28
11	28
12	27
13	27
14	27
15	27
16	26
17	26
18	26
19	26
20	25
21	25
22	25
23	24
24	24
25	23
26	23
27	22
28	22
29	21
30	21
31	21

	Dry (%)	Comfortable (%)	Humid (%)
1	82	18	0
2	81	19	0
3	81	19	0
4	80	19	1
5	79	20	1
6	79	20	1
7	79	20	1
8	78	21	1
9	77	22	1
10	77	22	1
11	75	23	2
12	74	24	2
13	73	25	2
14	72	26	2
15	70	27	3
16	70	27	3
17	68	28	4
18	67	29	4
19	65	30	5
20	64	31	5
21	62	32	6
22	61	33	6
23	59	35	6
24	57	36	7
25	56	37	7
26	55	38	7
27	52	40	8
28	51	41	8
29	50	42	8
30	48	43	8
31	47	45	8

	Avg high (°C)	Avg low (°C)
1	19	12
2	19	12
3	19	12
4	19	12
5	19	12
6	19	12
7	19	12
8	19	12
9	20	13
10	20	13
11	20	13
12	20	13
13	20	13
14	20	13
15	20	13
16	20	13
17	21	13
18	21	13
19	21	13
20	21	13
21	21	14
22	21	14
23	21	14
24	21	14
25	21	14
26	22	14
27	22	14
28	22	14
29	22	14
30	22	14
31	22	14

	Clearer (%)	Cloudier (%)
1	57	43
2	57	43
3	57	43
4	57	43
5	56	44
6	57	43
7	56	44
8	56	44
9	56	44
10	56	44
11	56	44
12	57	43
13	57	43
14	57	43
15	58	42
16	58	42
17	58	42
18	59	41
19	59	41
20	60	40
21	60	40
22	60	40
23	61	39
24	61	39
25	62	38
26	62	38
27	62	38
28	63	37
29	63	37
30	63	37
31	63	37

	Rain chance (%)
1	30
2	29
3	29
4	29
5	29
6	29
7	28
8	28
9	28
10	28
11	28
12	27
13	27
14	27
15	27
16	26
17	26
18	26
19	26
20	25
21	25
22	25
23	24
24	24
25	23
26	23
27	22
28	22
29	21
30	21
31	21

	Dry (%)	Comfortable (%)	Humid (%)
1	82	18	0
2	81	19	0
3	81	19	0
4	80	19	1
5	79	20	1
6	79	20	1
7	79	20	1
8	78	21	1
9	77	22	1
10	77	22	1
11	75	23	2
12	74	24	2
13	73	25	2
14	72	26	2
15	70	27	3
16	70	27	3
17	68	28	4
18	67	29	4
19	65	30	5
20	64	31	5
21	62	32	6
22	61	33	6
23	59	35	6
24	57	36	7
25	56	37	7
26	55	38	7
27	52	40	8
28	51	41	8
29	50	42	8
30	48	43	8
31	47	45	8