Cascais weather in March

In March, Cascais sees average daytime highs of 15°C and overnight lows near 13°C, with 56 mm of rain across 8.1 wet days and about 11.7 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 15°C through the month. The sky is clear or mostly clear about 45% of the time in March, and the air most often feels dry.

Daylight stretches from about 11 h 06 min at the start of March to 12 h 18 min by month's end. Set against the rest of the year, March is Cascais's 7th-clearest and 8th-windiest month. For the whole year in context, see Cascais's year-round climate.

Daytime high: 15°; 10th warmest
Overnight low: 13°; 3rd coldest
Rainfall: 56 mm; 8.1 wet days
Daylight: 11 h 42 min; 6:57 AM – 6:38 PM
Cloud cover: 48%; 7th clearest
Wind: 24 km/h; 8th windiest
Solar energy: 4.61 kWh/m²
Travel score: 4.7; out of 10

Air quality: Good; PM10 23.1 µg/m³ · 2019

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

← February Cascais year-round climate April →Best places to visit in March

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

Temperature in March

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 15°C through the month.

A typical March day in Cascais reaches about 15°C in the afternoon and slips back to 13°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 16°C. Set against its neighbours, March runs on par with February and on par with April.

	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)	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15	15
Avg low (°C)	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13	13

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

Cascais weather by month

How March compares with the rest of the year at a glance. March is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	14° / 12°	81	10.2	9.6	4.3
Feb	14° / 12°	60	8.2	10.5	4.3
Mar	15° / 13°	56	8.1	11.7	4.7
Apr	15° / 14°	50	7.8	13	5.1
May	17° / 15°	40	5.4	14.1	6.1
Jun	18° / 17°	8	1.8	14.7	7.5
Jul	19° / 18°	2	0.6	14.4	8.2
Aug	19° / 18°	4	0.8	13.5	8.2
Sep	19° / 18°	27	3.8	12.3	7.5
Oct	19° / 17°	80	9	11	6.3
Nov	17° / 15°	95	10.6	9.9	5.3
Dec	15° / 13°	89	10.6	9.3	4.6

Cloud cover in March

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in March.

Beyond those clear spells, partly cloudy skies cover about 17% of March, with mostly cloudy or overcast conditions the remaining 38%. 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 (%)	55	54	54	54	54	54	55	56	57	58	59	61	62	63	64	66	67	67	67	67	67	67	66	66	66	66	65	65	63	63	64
Cloudier (%)	45	46	46	46	46	46	45	44	43	42	41	39	38	37	36	34	33	33	33	33	33	33	34	34	34	34	35	35	37	37	36

	Clearer (%)	Cloudier (%)
1	55	45
2	54	46
3	54	46
4	54	46
5	54	46
6	54	46
7	55	45
8	56	44
9	57	43
10	58	42
11	59	41
12	61	39
13	62	38
14	63	37
15	64	36
16	66	34
17	67	33
18	67	33
19	67	33
20	67	33
21	67	33
22	67	33
23	66	34
24	66	34
25	66	34
26	66	34
27	65	35
28	65	35
29	63	37
30	63	37
31	64	36

Chance of precipitation in March

Any precipitation

Cascais gets around 56 mm of rain over 8.1 wet days in March. 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.

	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	30	30	30	29	29	28	28	27	26	26	25	24	24	24	23	23	23	23	23	24	24	24	25	25	26	26	26	26	27	27

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

Humidity in March

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, March lands in the dry band about 90% 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 (%)	96	95	95	95	95	94	94	94	94	93	93	92	92	91	90	90	89	88	88	88	87	87	86	86	86	86	86	86	86	86	86
Comfortable (%)	4	5	5	5	5	6	6	6	6	7	7	8	8	9	10	10	11	12	12	12	13	13	14	14	14	14	14	14	14	14	14

	Dry (%)	Comfortable (%)
1	96	4
2	95	5
3	95	5
4	95	5
5	95	5
6	94	6
7	94	6
8	94	6
9	94	6
10	93	7
11	93	7
12	92	8
13	92	8
14	91	9
15	90	10
16	90	10
17	89	11
18	88	12
19	88	12
20	88	12
21	87	13
22	87	13
23	86	14
24	86	14
25	86	14
26	86	14
27	86	14
28	86	14
29	86	14
30	86	14
31	86	14

Wind in March

Winds average 24 km/h in March.

Across March, daily wind ranges from about 23 km/h on the calmest days to 24 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)	24	24	24	24	24	24	24	24	24	23	23	23	23	23	23	23	23	23	23	23	23	23	24	24	24	24	24	24	24	24	24
Feels	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy	breezy

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

Sunrise & sunset in March

DaylightNight

Daylight runs from about 11 h 06 min at the start of March to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over March. Sunrise moves from 7:19 AM to 6:33 AM, and sunset from 6:23 PM to 6:53 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)	11.1	11.1	11.1	11.2	11.2	11.3	11.3	11.3	11.4	11.4	11.5	11.5	11.6	11.6	11.6	11.7	11.7	11.8	11.8	11.9	11.9	11.9	12.0	12.0	12.1	12.1	12.2	12.2	12.2	12.3	12.3
Sunrise (AM)	7:19	7:18	7:16	7:15	7:14	7:12	7:11	7:09	7:08	7:06	7:04	7:03	7:01	7:00	6:58	6:57	6:55	6:54	6:52	6:50	6:49	6:47	6:46	6:44	6:42	6:41	6:39	6:37	6:36	6:34	6:33
Sunset (PM)	6:23	6:24	6:25	6:26	6:27	6:28	6:29	6:30	6:31	6:32	6:33	6:34	6:35	6:36	6:37	6:38	6:39	6:40	6:41	6:42	6:43	6:44	6:45	6:46	6:47	6:48	6:49	6:50	6:51	6:52	6:53

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	11.1	7:19	6:23
2	11.1	7:18	6:24
3	11.1	7:16	6:25
4	11.2	7:15	6:26
5	11.2	7:14	6:27
6	11.3	7:12	6:28
7	11.3	7:11	6:29
8	11.3	7:09	6:30
9	11.4	7:08	6:31
10	11.4	7:06	6:32
11	11.5	7:04	6:33
12	11.5	7:03	6:34
13	11.6	7:01	6:35
14	11.6	7:00	6:36
15	11.6	6:58	6:37
16	11.7	6:57	6:38
17	11.7	6:55	6:39
18	11.8	6:54	6:40
19	11.8	6:52	6:41
20	11.9	6:50	6:42
21	11.9	6:49	6:43
22	11.9	6:47	6:44
23	12.0	6:46	6:45
24	12.0	6:44	6:46
25	12.1	6:42	6:47
26	12.1	6:41	6:48
27	12.2	6:39	6:49
28	12.2	6:37	6:50
29	12.2	6:36	6:51
30	12.3	6:34	6:52
31	12.3	6:33	6:53

Solar energy in March

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in March, about 4.61 kWh/m².

For context, solar energy here swings from a low near 2.01 kWh/m² to a high of 7.51 kWh/m² in July across the year — March's 4.61 kWh/m² falls in the middle.

	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)	3.9	3.9	4.0	4.0	4.0	4.1	4.2	4.2	4.3	4.3	4.4	4.5	4.5	4.6	4.7	4.7	4.8	4.8	4.8	4.9	4.9	5.0	5.0	5.0	5.0	5.1	5.1	5.1	5.2	5.2	5.2
Level	Moderate	Moderate	Moderate	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	3.9	Moderate
2	3.9	Moderate
3	4.0	Moderate
4	4.0	Bright
5	4.0	Bright
6	4.1	Bright
7	4.2	Bright
8	4.2	Bright
9	4.3	Bright
10	4.3	Bright
11	4.4	Bright
12	4.5	Bright
13	4.5	Bright
14	4.6	Bright
15	4.7	Bright
16	4.7	Bright
17	4.8	Bright
18	4.8	Bright
19	4.8	Bright
20	4.9	Bright
21	4.9	Bright
22	5.0	Bright
23	5.0	Bright
24	5.0	Bright
25	5.0	Bright
26	5.1	Bright
27	5.1	Bright
28	5.1	Bright
29	5.2	Bright
30	5.2	Bright
31	5.2	Bright

Planning a trip in March

Hazard calendar for Cascais

In seasonPeak

In March, Cascais sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Cascais's rainy season runs October–April, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is March a good time to visit Cascais?

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

4.7

Sightseeing

9th-best month of the year

0.0

Beach & pool

10th-best month of the year

March is a reasonable time to visit Cascais for sightseeing.

What to pack for Cascais in March

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

In March, Cascais sees daytime highs around 15°C and nights near 13°C. Worth packing: a warm layer, rain gear, sun protection and a windbreaker. About 8 days see rain.

a warm layerrain gearsun protectiona windbreaker

Sea temperature near Cascais in March

The nearest coast averages about 15°C in March — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in September at about 19°C and coldest in February near 15°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	15	15	15	16	18	18	19	19	18	17	16
Comfort	Cool	Bracing	Bracing	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool	Cool

	Sea temperature (°C)	Comfort
Jan	15	Cool
Feb	15	Bracing
Mar	15	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	16	Cool

UV index in Cascais in March

LowModerateHighVery highExtreme

Clear-sky midday UV in March peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cascais peaks around July 15 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

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

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

Location & terrain

Where is Cascais?

Cascais sits at 38.7°N, 9.4°W, 20 m above sea level, in Portugal. The nearest listed city is Monte Estoril, 2.0 km away.

Topography around Cascais

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

Within 3 km, the terrain around Cascais has only modest variations in elevation — a maximum elevation change of 119 m around an average of 27 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 513 m; within 80 km, large variations in elevation — a maximum elevation change of 651 m.

The land around Cascais is covered by water (50%) and artificial surfaces (29%) within 3 km, water (63%) within 16 km, and water (50%) and grassland (23%) within 80 km.

3 km

119 m

water 50%

16 km

513 m

water 63%

80 km

651 m

water 50%

treesshrubsgrasslandcroplandartificial surfacesbare terrainwater

← February Cascais year-round climate April →Best places to visit in March

March weather nearby: Monte Estoril 2.0 km · Estoril 2.0 km · Alcabideche 4.0 km · Parede 6.0 km · São Domingos de Rana 7.0 km · Carcavelos 9.0 km · Oeiras 10 km · Rio de Mouro 11 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 Cascais (38.6968°, -9.4215°, elevation 20 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	14	12
2	14	12
3	14	12
4	14	12
5	14	12
6	14	13
7	14	13
8	14	13
9	14	13
10	15	13
11	15	13
12	15	13
13	15	13
14	15	13
15	15	13
16	15	13
17	15	13
18	15	13
19	15	13
20	15	13
21	15	13
22	15	13
23	15	13
24	15	13
25	15	13
26	15	13
27	15	13
28	15	13
29	15	13
30	15	13
31	15	13

	Clearer (%)	Cloudier (%)
1	55	45
2	54	46
3	54	46
4	54	46
5	54	46
6	54	46
7	55	45
8	56	44
9	57	43
10	58	42
11	59	41
12	61	39
13	62	38
14	63	37
15	64	36
16	66	34
17	67	33
18	67	33
19	67	33
20	67	33
21	67	33
22	67	33
23	66	34
24	66	34
25	66	34
26	66	34
27	65	35
28	65	35
29	63	37
30	63	37
31	64	36

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

	Dry (%)	Comfortable (%)
1	96	4
2	95	5
3	95	5
4	95	5
5	95	5
6	94	6
7	94	6
8	94	6
9	94	6
10	93	7
11	93	7
12	92	8
13	92	8
14	91	9
15	90	10
16	90	10
17	89	11
18	88	12
19	88	12
20	88	12
21	87	13
22	87	13
23	86	14
24	86	14
25	86	14
26	86	14
27	86	14
28	86	14
29	86	14
30	86	14
31	86	14

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

	Clearer (%)	Cloudier (%)
1	55	45
2	54	46
3	54	46
4	54	46
5	54	46
6	54	46
7	55	45
8	56	44
9	57	43
10	58	42
11	59	41
12	61	39
13	62	38
14	63	37
15	64	36
16	66	34
17	67	33
18	67	33
19	67	33
20	67	33
21	67	33
22	67	33
23	66	34
24	66	34
25	66	34
26	66	34
27	65	35
28	65	35
29	63	37
30	63	37
31	64	36

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

	Dry (%)	Comfortable (%)
1	96	4
2	95	5
3	95	5
4	95	5
5	95	5
6	94	6
7	94	6
8	94	6
9	94	6
10	93	7
11	93	7
12	92	8
13	92	8
14	91	9
15	90	10
16	90	10
17	89	11
18	88	12
19	88	12
20	88	12
21	87	13
22	87	13
23	86	14
24	86	14
25	86	14
26	86	14
27	86	14
28	86	14
29	86	14
30	86	14
31	86	14

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

	Clearer (%)	Cloudier (%)
1	55	45
2	54	46
3	54	46
4	54	46
5	54	46
6	54	46
7	55	45
8	56	44
9	57	43
10	58	42
11	59	41
12	61	39
13	62	38
14	63	37
15	64	36
16	66	34
17	67	33
18	67	33
19	67	33
20	67	33
21	67	33
22	67	33
23	66	34
24	66	34
25	66	34
26	66	34
27	65	35
28	65	35
29	63	37
30	63	37
31	64	36

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

	Dry (%)	Comfortable (%)
1	96	4
2	95	5
3	95	5
4	95	5
5	95	5
6	94	6
7	94	6
8	94	6
9	94	6
10	93	7
11	93	7
12	92	8
13	92	8
14	91	9
15	90	10
16	90	10
17	89	11
18	88	12
19	88	12
20	88	12
21	87	13
22	87	13
23	86	14
24	86	14
25	86	14
26	86	14
27	86	14
28	86	14
29	86	14
30	86	14
31	86	14