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Cayman Islands (Grand Cayman)
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Cayman Islands weather

Weather in Cayman Islands for September 2025

Your guide to Cayman Islands weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Cayman Islands has been nearly identical to the historical average, with a temperature of 29.8 °C (showing only a slight deviation of -0.3 °C).

  • The forecast for the next days in Cayman Islands predicts temperatures to be around 30 °C, close to the historical average.

  • 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 increase, reaching an average of 30 °C by the end of September.

    • Rain 🌧️

  • Cayman Islands experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 409 mm.

Average dry days
5
Dry days
Average rainy days
25
Rainy days
Average snowy days
0
Snow days
Average temperatures
30°/28°
Temperatures
Average wind speed
24 km/h
Avg max wind
Average humidity
76 %
Avg humidity

Cayman Islands Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Moderate or heavy rain shower
29°
2
Heavy rain at times
29°
3
Patchy rain possible
30°
4
Moderate or heavy rain shower
31°
5
Patchy rain possible
30°
6
Patchy rain possible
30°
7
Patchy rain possible
30°
8
Patchy rain possible
30°
9
Moderate rain at times
31°
10
Partly cloudy
31°
11
Patchy rain possible
30°
12
Moderate rain at times
30°
13
Patchy rain possible
30°
14
Moderate or heavy rain shower
30°
15
Moderate rain at times
31°
16
Sunny
33°
17
Moderate rain
32°
18
Partly cloudy
30°
19
Patchy rain possible
30°
20
Patchy rain possible
30°
21
Patchy rain possible
29°
22
Patchy rain possible
29°
23
Patchy rain possible
30°
24
Patchy rain possible
30°
25
Patchy rain possible
30°
26
Partly cloudy
30°
27
Patchy rain possible
30°
28
Moderate rain
29°
29
Moderate rain
30°
30
Partly cloudy
31°

What’s the Weather Like in Cayman Islands This September?

Discover the average temperatures and weather trends across Cayman Islands’s cities this September.
Patchy rain possibleGrand Cayman30 °C / 28 °CPatchy rain possibleGeorge Town30 °C / 28 °CPatchy rain possibleWest Bay30 °C / 28 °CMore Locations

Temperatures trend during September in Cayman Islands

See the weather trend as well as the moving average line

September weather in Cayman Islands day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /27° 5.9 mm 6
2 Sept. Heavy rain at times
Heavy rain at times
 29° /28° 1.5 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
 30° /27° 0.8 mm 7
4 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /28° 3.8 mm 7
5 Sept. Patchy rain possible
Patchy rain possible
 30° /27° 5.6 mm 7
6 Sept. Patchy rain possible
Patchy rain possible
 30° /28° 6.8 mm 7
7 Sept. Patchy rain possible
Patchy rain possible
 30° /29° 0.8 mm 7
8 Sept. Patchy rain possible
Patchy rain possible
 30° /29° 4.9 mm 7
9 Sept. Moderate rain at times
Moderate rain at times
 31° /29° 6.9 mm 7
10 Sept. Partly cloudy
Partly cloudy
 31° /29° 4.3 mm 8
11 Sept. Patchy rain possible
Patchy rain possible
 30° /29° 0.8 mm 7
12 Sept. Moderate rain at times
Moderate rain at times
 30° /28° 1 mm 7
13 Sept. Patchy rain possible
Patchy rain possible
 30° /28° 0.5 mm 7
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 30° /29° 2.9 mm 7
15 Sept. Moderate rain at times
Moderate rain at times
 31° /29° 1.1 mm 8
16 Sept. Sunny
Sunny
 33° /29° 0 mm 2.7
17 Sept. Moderate rain
Moderate rain
 32° /29° 5.2 mm 2.3
18 Sept. Partly cloudy
Partly cloudy
 30° /29° 0 mm 2.3
19 Sept. Patchy rain possible
Patchy rain possible
 30° /29° 0.9 mm 2.7
20 Sept. Patchy rain possible
Patchy rain possible
 30° /29° 0.1 mm 0
21 Sept. Patchy rain possible
Patchy rain possible
 29° /29° 0.1 mm 6
22 Sept. Patchy rain possible
Patchy rain possible
 29° /29° 0.2 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
 30° /29° 0.1 mm 6
24 Sept. Patchy rain possible
Patchy rain possible
 30° /29° 0.3 mm 6
25 Sept. Patchy rain possible
Patchy rain possible
 30° /29° 1.9 mm 6
26 Sept. Partly cloudy
Partly cloudy
 30° /29° 0.1 mm 7
27 Sept. Patchy rain possible
Patchy rain possible
 30° /29° 0.5 mm 6
28 Sept. Moderate rain
Moderate rain
 29° /27° 7.7 mm 6
29 Sept. Moderate rain
Moderate rain
 30° /28° 6.4 mm 6
30 Sept. Partly cloudy
Partly cloudy
 31° /28° 6.8 mm 8
Next
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.
Change Month
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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

What are the expected maximum and minimum temperatures in Cayman Islands during September?
During September, expect a variety of temperatures with highs around 30° and lows near 28°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cayman Islands during September?
Significant rainfall exceeding 409 mm is expected in Cayman Islands during September, occurring over more than 25 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cayman Islands during September?
The average wind speed in Cayman Islands during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Cayman Islands

Explore the daily rainfall trends and prepare for Cayman Islandss September weather 💧

UV exposure in Cayman Islands during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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George TownGrand CaymanWest Bay
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Location coordinates Where is Cayman Islands?

Get accurate weather forecasts for Cayman Islands, located at latitude 19.323 and longitude -81.249. Stay updated with localized weather information tailored for Cayman Islands.

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