Climate Overview
The climate in Imperial Beach is temperate. The average annual temperature is 17°C and approximately 384mm of precipitation falls per year. March is the wettest month, receiving around 74mm of rainfall. Imperial Beach is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, September, July. The coldest months are February, January, March, when temperatures can drop to 11°C.
Temperature
Imperial Beach sees moderate temperature variation throughout the year, ranging from 11°C to 24°C. August is the warmest month, though highs remain moderate at 24°C with a mean of 21°C. February is the coolest month, with minimum temperatures around 11°C and an average of 13°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between October and November, with a 3°C shift in average temperatures.
Precipitation
Imperial Beach is a quite dry location, receiving approximately 384mm of precipitation annually, which averages out to around 32mm per month. The wettest month is March, averaging 74mm of rainfall. January and February also tend to see above-average precipitation. The driest month is July, with just 3mm. That's 71mm less than March, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Imperial Beach is relatively calm, with an average annual wind speed of 10km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.
Seasons
7 days until Autumn
It is currently summer in Imperial Beach, which began on June 21, 2026. Imperial Beach is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 24°C, while the coldest stretch bottoms out in February near 11°C. Autumn is next, beginning on September 23, 2026 (7 days from now).
Spring
Temperatures range from 12 to 18°C. Rainfall is relatively light, with around 118mm over the season and a monthly average of 39mm. Winds are generally light, averaging 10km/h. Light layers work well as temperatures warm through the season. It is a great time to be outdoors.
Summer
Temperatures range from 16 to 24°C. Precipitation is minimal, with only around 15mm for the entire season. Winds are generally light, averaging 10km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 14 to 23°C. Rainfall is relatively light, with around 55mm over the season and a monthly average of 18mm. Winds are generally light, averaging 9km/h. Layered clothing works best as temperatures gradually cool. Enjoy the crisp air and changing scenery.
Winter
Temperatures range from 11 to 17°C. Precipitation is moderate at around 195mm for the season, averaging 65mm per month. Winds are generally light, averaging 10km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit Imperial Beach is during May, June, July, August, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 13mm per month. By contrast, February can be quite cold with temperatures dropping to 11°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
Monthly Climate Data
The table below shows monthly climate averages for Imperial Beach based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
