Your September weather guide
HotWeather in Bermuda in September
September is a good choice for Bermuda if you want warm swimming weather and can keep your plans flexible around rain. Daytime highs average 26.4°C, the sea is warmer still at 27.4°C, and about 15 days have measurable rain. For a UK traveller, the appeal is dependable warmth rather than dependable sunshine. The catch is humid air and warm nights, so this suits a swim-focused holiday better than a trip built around staying active outdoors.
Long-term climate averages for Hamilton, not a forecast · 1991-2020
Bermuda, month by month
Your snapshot
At a glance
The useful details for Hamilton.
- Average daytime high
- 26.4°C
- 9 in 10 days stay below 28°C
- Average night-time low
- 25.0°C
- coldest 10% of nights: 24°C or lower
- Compared with London
- +7.8°C
- London averages 18.6°C in September
- Sea temperature
- 27.4°C
- year to year: 27°C to 28°C
- Sunshine per day (est.)
- 5.4h
- 44% of 12.2 h of daylight
- Rainy days (1 mm+)
- 15
- 138 mm over the month
- Humidity
- 79%
- Days over 25°C
- 96%
- none over 30°C
- Record high 1991-2020
- 28.9°C
- 2020-09-02
- Record low 1991-2020
- 22.5°C
- 1991-09-30
- Flight from London
- ≈ 7 h 42 min
- 5553 km, long-haul (estimate for a direct flight)
Records are observed extremes within 1991-2020, not typical holiday conditions. Warm-day percentages are shares of days, not day counts.
How September compares
September is the 3rd warmest month of the year in Bermuda and ranks 74th of 134 destinations we compare for September - see where else is hot in September. Against London's average high of 18.6°C in September, Bermuda is 7.8°C warmer by day and 13.8°C warmer at night.
Daytime and night-time in September
The typical September day in Bermuda peaks at 26.4°C, but that is an average: the warmest 10% of days reach 27.5°C or more. About 96% of days top 25°C. Nights average 25.0°C; one night in ten drops to 23.9°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest September day here reached 28.9°C (2020-09-02) and the coldest night 22.5°C (1991-09-30).
Rain in September
Wet (more than 8 rainy days): about 15 days with 1 mm or more, 138 mm in total. Year to year it varies a lot - the wettest September was 2013 with 335 mm, the driest 2004 with 26 mm. Humidity averages 79%.
Sea temperature in September
The sea averages 27.4°C - warm enough to swim (22°c+). Depending on the year it ranges from 26.7°C to 28.1°C. For the warmest sea here, come in August (28.0°C).
Sunshine and daylight
Around 5.4 hours of sunshine a day (estimated from cloud cover), 12.2 hours of daylight: the sun rises about 07:03 and sets about 19:26 local time in mid-September. Average cloud cover is 56%.
Is September a good time to visit Bermuda?
It is a reasonable choice: hot days but expect showers. The best months for Bermuda on our scoring are June, July, August; months averaging 25°C or more: Jul, Aug, Sep.
Warm sea, warm nights
Bermuda feels noticeably warmer than London in September, with average daytime highs 7.8°C higher. The heat is fairly steady: 96% of days reach 25°C, while nights average 25°C, giving little relief after sunset. Humidity of 79% can make that warmth feel close, particularly when walking around at midday. Pack light, breathable clothing and choose accommodation with air conditioning if warm nights affect your sleep. A heavy evening layer is unlikely to earn its place in your case. The sea is comfortably warm for swimming, making time in the water a strong reason to choose September, even if you prefer to take land-based activities slowly.
Plan for wet weather, not just sunshine
Rain is the main compromise. About 15 days bring measurable rainfall, so a completely dry holiday is not something to count on. That does not tell you how long rain will last on any particular day, and it would be a mistake to assume it only arrives as brief showers. Keep outdoor plans movable and pack a light waterproof that will not feel too heavy in humid weather. Average sunshine is about 5.4 hours within 12.2 hours of daylight: there is scope for sunny spells, but not a reliable run of clear skies. September works best if you can enjoy the warmth without needing every day to be a sunbathing day.
A little perspective
Bermuda through the year
September is highlighted. See how it compares with the rest of the year.
| Month | Day | Night | Sea | Sun/day | Rain mm | Rainy days | Days 25°C+ |
|---|---|---|---|---|---|---|---|
| January | 19.5°C | 17.3°C | 20.6°C | 2.9 | 106 | 13 | 0% |
| February | 19.0°C | 16.8°C | 19.8°C | 3.4 | 101 | 13 | 0% |
| March | 18.8°C | 16.7°C | 19.5°C | 4.1 | 110 | 12 | 0% |
| April | 19.7°C | 18.1°C | 20.0°C | 5.4 | 81 | 10 | 0% |
| May | 21.6°C | 20.3°C | 21.8°C | 5.9 | 87 | 10 | 0% |
| Junebest | 24.4°C | 23.1°C | 24.5°C | 5.9 | 109 | 13 | 34% |
| Julybest | 26.5°C | 25.2°C | 27.1°C | 6.9 | 106 | 16 | 96% |
| Augustbest | 27.1°C | 25.6°C | 28.0°C | 6.5 | 125 | 17 | 100% |
| SeptemberSelected | 26.4°C | 25.0°C | 27.4°C | 5.4 | 138 | 15 | 96% |
| October | 24.6°C | 23.2°C | 25.7°C | 4.2 | 142 | 14 | 46% |
| November | 22.3°C | 20.6°C | 23.5°C | 3.8 | 98 | 12 | 1% |
| December | 20.7°C | 18.7°C | 21.8°C | 3.1 | 99 | 11 | 0% |
Day = average daytime high, night = average night-time low, 1991-2020.Sun is hours per day; rainy days count 1 mm or more.
Day, night and sea
Monthly average temperatures, 1991-2020
- Day
- Night
- Sea
Best months here
On warmth, low rainfall and sunshine, start with these.
Keep exploring
Similar in September
Closest matches on daytime temperature, sea temperature and sunshine, in other countries.
Seychelles · 26°C by day · sea 27°C
Seychelles
Indonesia · 27°C by day · sea 26°C
Bali
Cape Verde · 27°C by day · sea 27°C
Sal
Kenya · 28°C by day · sea 26°C
Mombasa
Japan · 26°C by day · sea 25°C
Tokyo
A little more detail
Bermuda in September FAQs
Plain answers, grounded in the averages.
Is Bermuda hot in September?
Bermuda is hot in September: the average daytime high is 26.4°C and nights average 25.0°C. About 96% of September days reach 25°C or more.
Can you swim in the sea in Bermuda in September?
The sea around Bermuda averages 27.4°C in September, which is warm enough for most people to swim comfortably. Between 1991 and 2020 it ranged from 27°C to 28°C depending on the year.
How much does it rain in Bermuda in September?
Bermuda sees about 15 rainy days (1 mm or more) and 138 mm of rain in a typical September. The wettest September between 1991 and 2020 was 2013 (335 mm) and the driest was 2004 (26 mm).
How sunny is Bermuda in September?
Bermuda gets around 5.4 hours of sunshine a day in September out of 12.2 hours of daylight (estimated from average cloud cover).
How does Bermuda compare with the UK in September?
Bermuda is on average 7.8°C warmer than London by day in September (26.4°C against 18.6°C).
What is the hottest September on record in Bermuda?
Between 1991 and 2020 the hottest September day in Bermuda reached 28.9°C on 2020-09-02, and the coldest night dropped to 22.5°C on 1991-09-30.
Is September the best month for Bermuda's weather?
June, July and August are stronger choices overall. September still offers warm days and comfortable sea swimming, but wet weather is a meaningful drawback. Choose it for warmth rather than the expectation of consistently dry, sunny conditions.
How long is the flight from London?
The flight from London takes about 7 hours 42 minutes, making Bermuda a long-haul choice. For that travel time, September offers a clear step up in warmth from home, though you should be comfortable accepting rain as part of the holiday.
About these averages
ERA5-Land climate reanalysis via Open-Meteo (11 km grid) and NOAA Coral Reef Watch 5 km sea temperatures, 1991-2020
Averages computed from daily values at Hamilton. Sea temperature from the nearest 5 km sea cell, 2.3 km from that point. Sunshine hours are estimated from average cloud cover.Records are the highest and lowest daily values in that 30-year period, not all-time records. These are climate averages, not a forecast for your trip. How we measure holiday weather
- Hot · 25°C+
- Warm · 20°C to below 25°C
- Mild · 15°C to below 20°C
- Cool · below 15°C