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Live forecasts update automatically; written guidance last reviewed 16 June 2026 by the Canada Scope Weather Desk. Data from Environment and Climate Change Canada and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
San Diego enjoys a mild Mediterranean climate with warm, dry summers and cool, wet winters. The live forecast above shows current conditions; average daily highs range from 19 °C (66 °F) in January to 26 °C (79 °F) in August, making it one of the most consistently pleasant year-round destinations in North America.
What is the typical weather in San Diego?
San Diego’s climate is defined by the Pacific Ocean: cool currents keep summer peaks moderate and winter lows above 10 °C. The rainy season runs from November through March, while May through October are nearly rainless. For a detailed breakdown of san diego weather by month, expect the warmest days in August and September and the coolest, wettest period in December and January. Temperatures are given in Celsius on this page; for san diego weather fahrenheit, simply multiply by 1.8 and add 32.
How reliable are San Diego weather forecasts?
Short-range forecasts are very dependable. A weather in san diego 10 days outlook is usually accurate for high/low trends, while a weather in san diego 14 days projection offers a good sense of pattern shifts. For planning, a san diego weather 15 day or san diego weather 30 day forecast gives a broad idea but becomes less precise beyond two weeks. Hourly detail—san diego weather hourly—is most useful within the next 48 hours, when marine layer and sea breeze effects are best modelled.
Does San Diego ever get cold?
Winters are mild, not cold. Overnight lows in December and January occasionally dip to 7 °C (45 °F), but daytime temperatures almost always rise above 16 °C (61 °F). Freezing is extremely rare.
When is the rainy season in San Diego?
The rainy season runs roughly from November through March, with February typically the wettest month. Even then, rain comes as short, light showers—total annual rainfall is only about 250 mm.
What’s the best time to visit San Diego for warm weather?
August through October offer the warmest sea temperatures and the most consistently sunny days. July and August are peak summer heat, but marine breezes keep it comfortable.