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Weather in Cayman Islands for September 2025

Your guide to Cayman Islands weather in September - trends and predictions
  • In general, the average temperature in Cayman Islands at the beginning of September is 29.9 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 29.6 °C by the end of September.

  • Cayman Islands experiences an exceptionally high level of rainfall in September, with more than 20 rainy days on average.

  • Is September a good time to visit Cayman Islands? check out the best time to travel to Cayman Islands page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
7
Dry days
Average rainy days
23
Rainy days
Average snowy days
0
Snow days
Average temperatures
31°/28°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Cayman Islands in September average weather

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Temperatures trend during September in Cayman Islands

See the weather trend as well as the moving average line
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September weather day by day

Click on a date for more information
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
31° /28° 0.8 mm 7
2 Sept. Overcast
Overcast
29° /28° 2.7 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
31° /28° 5.3 mm 7
4 Sept. Thundery outbreaks possible
Thundery outbreaks possible
30° /28° 2.5 mm 7
5 Sept. Patchy rain possible
Patchy rain possible
29° /27° 3 mm 6
6 Sept. Thundery outbreaks possible
Thundery outbreaks possible
29° /28° 3.4 mm 6
7 Sept. Patchy rain possible
Patchy rain possible
30° /28° 0.4 mm 7
8 Sept. Patchy light rain with thunder
Patchy light rain with thunder
30° /28° 0.9 mm 7
9 Sept. Moderate rain at times
Moderate rain at times
31° /28° 0.7 mm 7
10 Sept. Thundery outbreaks possible
Thundery outbreaks possible
30° /28° 0 mm 7
11 Sept. Moderate rain at times
Moderate rain at times
30° /29° 2.2 mm 7
12 Sept. Cloudy
Cloudy
31° /28° 0 mm 7
13 Sept. Moderate or heavy rain with thunder
Moderate or heavy rain with thunder
30° /28° 5.9 mm 7
14 Sept. Partly cloudy
Partly cloudy
31° /29° 2.4 mm 8
15 Sept. Cloudy
Cloudy
31° /28° 0.1 mm 7
16 Sept. Partly cloudy
Partly cloudy
31° /28° 1.6 mm 8
17 Sept. Patchy rain possible
Patchy rain possible
32° /28° 4.3 mm 7
18 Sept. Cloudy
Cloudy
30° /28° 0.6 mm 7
19 Sept. Patchy light rain with thunder
Patchy light rain with thunder
32° /29° 17 mm 7
20 Sept. Light rain shower
Light rain shower
30° /28° 11.5 mm 7
21 Sept. Partly cloudy
Partly cloudy
31° /29° 1.2 mm 7
22 Sept. Patchy rain possible
Patchy rain possible
31° /28° 1.3 mm 7
23 Sept. Partly cloudy
Partly cloudy
30° /28° 4.9 mm 7
24 Sept. Thundery outbreaks possible
Thundery outbreaks possible
29° /27° 55.3 mm 6
25 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
29° /28° 87.3 mm 7
26 Sept. Torrential rain shower
Torrential rain shower
29° /26° 36.8 mm 7
27 Sept. Thundery outbreaks possible
Thundery outbreaks possible
30° /28° 8.7 mm 7
28 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
30° /28° 1.5 mm 7
29 Sept. Patchy rain possible
Patchy rain possible
29° /28° 4.5 mm 6
30 Sept. Patchy rain possible
Patchy rain possible
31° /28° 3.5 mm 8
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Important Notice
Our weather forecast for Cayman Islands in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Cayman Islands forecast closer to your planned date for the most up-to-date weather information.

Guide for Cayman Islands in September

In the Cayman Islands, September marks the transition from the peak of the summer season to the beginning of the fall season. At the beginning of the month, the weather in the Cayman Islands is typically warm and humid, with average temperatures ranging from 28° to 31°.

The sea temperatures are also quite warm, making it an ideal time for water activities such as snorkeling and diving. However, there is a higher chance of experiencing brief showers or thunderstorms during this time, as it is the tail end of the wet season.

By the end of September, the weather in the Cayman Islands begins to show signs of the approaching fall season. The temperatures start to gradually decrease, with average highs around 30° and lows around 26°.

The humidity also begins to lessen, providing a more comfortable environment for outdoor activities. The sea conditions remain favorable for water sports and beach outings, with water temperatures remaining warm and inviting.

Overall, September in the Cayman Islands offers a mix of warm temperatures, occasional showers, and decreasing humidity as the month progresses, making it a great time to enjoy the island's natural beauty and outdoor attractions.

Cayman Islands in September - FAQ

Is September a good time to visit Cayman Islands?
You can travel to Cayman Islands in September, but there are probably better months doing so, read more about the best time to visit Cayman Islands
What are the expected maximum and minimum temperatures in Cayman Islands during September?
During September, expect a variety of temperatures with highs around 31° and lows near 28°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cayman Islands during September?
Moderate rainfall is anticipated in Cayman Islands during September, with a total of 98.6 mm spread over approximately 23 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Cayman Islands during September?
The average wind speed in Cayman Islands during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Cayman Islands in September?

As you prepare for your trip to Cayman Islands in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Cayman Islands, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Lightweight Clothing: T-shirts, blouses, shorts, skirts
    • Rain Gear: Lightweight, waterproof clothing
  • Footwear
    • Waterproof Shoes
    • Sandals/Flip-flops: Comfortable for warm climates
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Umbrellas/Raincoats: For rainy days
  • Personal Items
    • Sunscreen: High SPF for sunny destinations
    • Lip Balm with SPF: To protect against chapped lips
    • Insect Repellent: For destinations with mosquitos or other insects
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Location coordinates Where is Cayman Islands?

Get accurate weather forecasts for Cayman Islands, located at latitude 19.287 and longitude -81.374. Stay updated with localized weather information tailored for Cayman Islands.

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