Climate Insights for Beihai

The climate in Beihai is warm and mild. The average annual temperature is 24°C and approximately 2025mm of precipitation falls per year. August is the wettest month, receiving around 489mm of rainfall. Beihai is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, December, February, when temperatures can drop to 15°C.

Beihai sees moderate temperature variation throughout the year, ranging from 15°C to 31°C. The warmest month is July, when average highs reach 31°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 15°C and an average of 17°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows. The sharpest temperature change occurs between November and December, with a 4°C shift in average temperatures.

Beihai is a very wet location, receiving approximately 2025mm of precipitation annually, which averages out to around 169mm per month. The wettest month is August, averaging 489mm of rainfall. July and June also tend to see above-average precipitation. The driest month is December, with just 29mm. That's 460mm less than August, 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.

Beihai is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Beihai, which began on June 21, 2026. Beihai 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 July at around 31°C, while the coldest stretch bottoms out in January near 15°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Beihai is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 57mm per month. By contrast, July can be uncomfortably hot with temperatures reaching 31°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Beihai 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.