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Weather in Seal Beach, California for September 2025

Your guide to Seal Beach weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Beach Hazards Statement - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Seal Beach is slightly cooler than the historical average by -1.5 °F.

  • Expect cooler weather in the next days in Seal Beach with the forecast suggesting a temperature of 24.8 °F, lower than the historical average.

  • In general, the average temperature in Seal Beach at the beginning of September is 27.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 23.3 °F by the end of September.

    • Rain 🌧️

  • Precipitation in Seal Beach during September is a rare event, with an average of fewer than 2 rainy days.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
30
Dry days
Average rainy days
0
Rainy days
Average snowy days
0
Snow days
Average temperatures
24°/18°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Seal Beach Weather September

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

Temperatures trend during September in Seal Beach

See the weather trend as well as the moving average line

September weather in Seal Beach day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 26° /19° 0 mm 7
Sept. 2 Sunny
Sunny
 27° /21° 0 mm 7
Sept. 3 Sunny
Sunny
 29° /22° 0 mm 8
Sept. 4 Sunny
Sunny
 27° /21° 0 mm 7
Sept. 5 Sunny
Sunny
 28° /20° 0 mm 7
Sept. 6 Sunny
Sunny
 28° /20° 0 mm 7
Sept. 7 Sunny
Sunny
 29° /20° 0 mm 7
Sept. 8 Sunny
Sunny
 30° /21° 0 mm 7
Sept. 9 Sunny
Sunny
 26° /21° 0 mm 7
Sept. 10 Sunny
Sunny
 24° /19° 0 mm 6
Sept. 11 Sunny
Sunny
 22° /18° 0 mm 6
Sept. 12 Sunny
Sunny
 22° /18° 0 mm 6
Sept. 13 Partly cloudy
Partly cloudy
 22° /18° 0 mm 6
Sept. 14 Partly cloudy
Partly cloudy
 23° /18° 0 mm 6
Sept. 15 Partly cloudy
Partly cloudy
 26° /18° 0 mm 1.9
Sept. 16 Partly cloudy
Partly cloudy
 28° /19° 0 mm 1.9
Sept. 17 Mist
Mist
 26° /19° 0 mm 1.5
Sept. 18 Moderate rain
Moderate rain
 24° /22° 14 mm 1.9
Sept. 19 Patchy rain possible
Patchy rain possible
 25° /22° 1.2 mm 0
Sept. 20 Sunny
Sunny
 26° /22° 0 mm 6
Sept. 21 Partly cloudy
Partly cloudy
 26° /21° 0 mm 6
Sept. 22 Patchy rain possible
Patchy rain possible
 24° /21° 0.8 mm 5
Sept. 23 Sunny
Sunny
 23° /20° 0 mm 6
Sept. 24 Sunny
Sunny
 26° /21° 0 mm 6
Sept. 25 Sunny
Sunny
 26° /21° 0 mm 6
Sept. 26 Sunny
Sunny
 23° /20° 0 mm 6
Sept. 27 Sunny
Sunny
 22° /18° 0 mm 6
Sept. 28 Sunny
Sunny
 22° /19° 0 mm 5
Sept. 29 Mist
Mist
 22° /14° 0 mm 5
Sept. 30 Mist
Mist
 22° /14° 0 mm 5
Next
Important Notice
Our weather forecast for Seal Beach 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 Seal Beach forecast closer to your planned date for the most up-to-date weather information.
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Seal Beach in September - FAQ

What are the expected maximum and minimum temperatures in Seal Beach during September?
During September, expect a variety of temperatures with highs around 24° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Seal Beach during September?
Rainfall in Seal Beach during September is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 0 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Seal Beach during September?
The average wind speed in Seal Beach during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Seal Beach

Explore the daily rainfall trends and prepare for Seal Beachs September weather 💧

UV exposure in Seal Beach during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Seal Beach?

Get accurate weather forecasts for Seal Beach, located at latitude 33.741 and longitude -118.105. Stay updated with localized weather information tailored for Seal Beach.

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