Monthly weather forecast and climate
Seal Beach, CA

January and February, with an average high-temperature of 68°F (20°C), are the coldest months. In Seal Beach, 2.9" (74.9mm) of precipitation is typically accumulated.
Weather in January »
The coldest months are January and February, with an average high-temperature of 68°F (20°C). The month with the most rainfall is February when 3" (76.5mm) of precipitation is typically aggregated.
Weather in February »
In March, the average high-temperature is 69.1°F (20.6°C), and the average low-temperature is 50°F (10°C). During March, Seal Beach regularly aggregates up to 2.4" (61.7mm) of precipitation.
Weather in March »
In April, the average high-temperature is 73°F (22.8°C), and the average low-temperature is 53.1°F (11.7°C). Throughout April, 0.6" (15.2mm) of precipitation is accumulated.
Weather in April »
In Seal Beach, the average high-temperature is 73.9°F (23.3°C), and the average low-temperature is 57.9°F (14.4°C). In Seal Beach, 0.2" (5.8mm) of precipitation is typically accumulated.
Weather in May »
In Seal Beach, in June, the average high-temperature is 78.1°F (25.6°C), and the average low-temperature is 61°F (16.1°C). In Seal Beach, 0.1" (2mm) of precipitation is typically accumulated.
Weather in June »
In Seal Beach, California, in July, the average high-temperature is 82.9°F (28.3°C), and the average low-temperature is 64.9°F (18.3°C). July is the month with the least rainfall, with 0" (0.5mm) of accumulated precipitation.
Weather in July »
August is the warmest month, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 66°F (18.9°C). During August, Seal Beach regularly aggregates up to 0.1" (2.5mm) of precipitation.
Weather in August »
In Seal Beach, the average high-temperature is 82.9°F (28.3°C), and the average low-temperature is 64°F (17.8°C). During September, Seal Beach regularly aggregates up to 0.2" (6.1mm) of precipitation.
Weather in September »
In October, the average high-temperature is 79°F (26.1°C), and the average low-temperature is 57.9°F (14.4°C). During October, Seal Beach regularly aggregates up to 0.4" (10.2mm) of precipitation.
Weather in October »
In Seal Beach, California, the average high-temperature is 73°F (22.8°C), and the average low-temperature is 50°F (10°C). Throughout November, 1.1" (28.4mm) of precipitation is accumulated.
Weather in November »
In Seal Beach, California, in December, the average high-temperature is 69.1°F (20.6°C), and the average low-temperature is 45°F (7.2°C). In Seal Beach, California, in December, 1.8" (44.7mm) of precipitation is typically accumulated.
Weather in December »

What is the coldest month in Seal Beach?

January and February, with an average high-temperature of 68°F (20°C), are the coldest months in Seal Beach.

How much does it rain in Seal Beach?

During the entire year, Seal Beach aggregates up to 12.9" (328.5mm) of precipitation.

What month is the ocean coldest in Seal Beach?

January is the month with the coldest seawater, with an average ocean temperature of 58.3°F (14.6°C). Swimming in 58.3°F (14.6°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the rainiest month in Seal Beach?

The month with the most rainfall in Seal Beach is February when 3" (76.5mm) of precipitation is typically aggregated.

When are the longest days in Seal Beach?

The month with the longest days in Seal Beach, California, is June, with an average of 14.4h of daylight.

What is the driest month in Seal Beach?

The month with the least rainfall in Seal Beach is July when 0" (0.5mm) of precipitation is typically aggregated.

What are the months with the warmest ocean in Seal Beach?

Months with the warmest seawater in Seal Beach, California, are July and August, with an average ocean temperature of 67.8°F (19.9°C). For most, swimming in 67.8°F (19.9°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the warmest month in Seal Beach?

With an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 66°F (18.9°C), August is the warmest month in Seal Beach.

What is the month with the shortest days in Seal Beach?

December has the shortest days of the year, with an average of 9.9h of daylight.
Average rainfall - Seal Beach, CA
Average sea temperature - Seal Beach, CA

Best months for swimming (with the highest average sea temperature) are July and August (67.9°F).
The coldest month (with the lowest average sea temperature) is January (58.3°F).

Average daylight - Seal Beach, CA

The month with the longest days is June (Average daylight: 14.4h).
The month with shortest days is December (Average daylight: 9.9h).

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