Port-Gentil weather in May

In May, Port-Gentil sees average daytime highs of 27°C and overnight lows near 25°C, with 110 mm of rain across 17.3 wet days and about 12 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 8% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 hours at the start of May to 12 hours by month's end. Set against the rest of the year, May is Port-Gentil's 5th-clearest and 6th-windiest month. For the whole year in context, see Port-Gentil's year-round climate.

Daytime high
27°
5th warmest
Overnight low
25°
9th coldest
Rainfall
110 mm
17.3 wet days
Daylight
12 hours
6:22 AM – 6:20 PM
Cloud cover
75%
5th clearest
Wind
14 km/h
6th windiest
Solar energy
4.78 kWh/m²
Travel score
5.3
out of 10

Port-Gentil is city in Gabon.

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical May day in Port-Gentil reaches about 27°C in the afternoon and slips back to 25°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 28°C. Set against its neighbours, May runs about 1°C cooler than April and about 2°C warmer than June.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12826
22826
32826
42826
52826
62826
72826
82826
92726
102726
112726
122726
132726
142726
152726
162726
172726
182725
192725
202725
212725
222725
232725
242725
252725
262625
272625
282625
292625
302625
312625

How May really feels in Port-Gentil

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Port-Gentil weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°23027.4123.8
Feb28° / 26°16922.7123.9
Mar28° / 26°17624123.8
Apr28° / 26°16122124.1
May27° / 25°11017.3125.3
Jun25° / 24°183.8127.6
Jul24° / 23°82.2128.1
Aug24° / 23°72.2128.0
Sep25° / 24°348.6126.7
Oct26° / 25°14723.2124.5
Nov27° / 25°27528123.6
Dec27° / 25°26228.4123.7

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 74%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11783
21783
31981
42080
52080
62080
72278
82278
92377
102476
112476
122674
132674
142674
152773
162773
172674
182773
192773
202872
212872
222971
232971
243070
253070
263169
273169
283268
293268
303367
313466

Chance of precipitation in May

Any precipitation

Port-Gentil gets around 110 mm of rain over 17.3 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 55% and peaks near 69% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
169
268
368
467
566
665
765
864
963
1062
1161
1260
1360
1459
1558
1658
1757
1856
1955
2054
2153
2251
2349
2447
2545
2643
2741
2839
2937
3035
3132

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
104060
204159
304258
404258
504456
604555
704753
804852
905050
1005248
1105446
1205644
1305842
1406040
1506337
1606535
1706733
1807030
1907228
2007426
2107624
2217722
2317920
2418118
2518316
2628414
2728513
2828711
292899
303898
313916

Wind in May

Winds average 14 km/h in May.

Across May, daily wind ranges from about 12 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612light breeze
712light breeze
812light breeze
912light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3017light breeze
3117light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 hours at the start of May to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over May. Sunrise moves from 6:23 AM to 6:23 AM, and sunset from 6:21 PM to 6:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:236:21
212.06:236:21
312.06:236:21
412.06:236:21
512.06:226:21
612.06:226:21
712.06:226:21
812.06:226:20
912.06:226:20
1012.06:226:20
1112.06:226:20
1212.06:226:20
1312.06:226:20
1412.06:226:20
1512.06:226:20
1612.06:226:20
1712.06:226:20
1812.06:226:20
1912.06:226:20
2012.06:226:20
2112.06:226:20
2212.06:226:20
2312.06:226:20
2412.06:236:20
2512.06:236:20
2612.06:236:21
2712.06:236:21
2812.06:236:21
2912.06:236:21
3012.06:236:21
3112.06:236:21

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.78 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 5.13 kWh/m² in March across the year — May's 4.78 kWh/m² falls in the middle.

024151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.8Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.7Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
314.6Bright
Planning a trip in May

Hazard calendar for Port-Gentil

In seasonPeak

None of Port-Gentil's seasonal hazards are active in May. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Port-Gentil'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 May a good time to visit Port-Gentil?

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

5.3
Sightseeing
5th-best month of the year
5.4
Beach & pool
5th-best month of the year

May is a reasonable time to visit Port-Gentil for sightseeing.

What to pack for Port-Gentil in May

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

In May, Port-Gentil sees daytime highs around 27°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Port-Gentil in May

The nearest coast averages about 28°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 March at about 29°C and coldest in July near 25°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Tropical
Feb29Tropical
Mar29Tropical
Apr29Tropical
May28Warm
Jun26Warm
Jul25Warm
Aug25Warm
Sep26Warm
Oct27Warm
Nov27Warm
Dec28Warm

UV index in Port-Gentil in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Port-Gentil peaks around March 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 19 at about 8 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 20UV 14Jun 19UV 8
UV index (midday)Level
Jan12Extreme
Feb12Extreme
Mar14Extreme
Apr13Extreme
May11Extreme
Jun8Very high
Jul9Very high
Aug9Very high
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Extreme

Air quality in Port-Gentil in May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.

Air quality in Port-Gentil is worst in February — around 25 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (October, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateFeb 1224 µg/m³Oct 178 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb25Moderate
Mar18Moderate
Apr14Moderate
May16Moderate
Jun21Moderate
Jul21Moderate
Aug18Moderate
Sep11Good
Oct8Good
Nov11Good
Dec17Moderate
Location & terrain

Where is Port-Gentil?

Port-Gentil sits at 0.7°S, 8.8°E, 4 m above sea level, in Gabon. The nearest listed city is Owendo, 138 km away.

OwendoLibrevilleAkandaLambarénéNtoumOyamMouila

Topography around Port-Gentil

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

Within 3 km, the terrain around Port-Gentil has only modest variations in elevation — a maximum elevation change of 9 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 41 m; within 80 km, only modest variations in elevation — a maximum elevation change of 236 m.

The land around Port-Gentil is covered by artificial surfaces (50%) and water (38%) within 3 km, water (77%) within 16 km, and water (60%) and trees (28%) within 80 km.

3 km
9 m
16 km
41 m
80 km
236 m
treesgrasslandartificial surfacesbare terrainwaterwetlandmangroves
May weather nearby: Owendo 138 km · Libreville 144 km · Akanda 160 km · Lambaréné 162 km · Ntoum 165 km · Oyam 219 km · São Tomé 257 km · Mouila 283 km

Gabon travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / E
220 V · 50 Hz
Prices
≈ 37% of US
price level, 2025
GDP per capita
$8,263
2025
Happiness
5.2 / 10
World Happiness, 2025
Road deaths
23.9
per 100k/yr, 2019
Income group
Upper middle
World Bank
Religion
Protestant 46%Roman Catholic 30%Muslim 11%none 7%

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 Port-Gentil (-0.7193°, 8.7815°, elevation 4 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. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).