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Live forecasts update automatically; written guidance last reviewed 23 June 2026 by the Oz Reviewly Weather Desk. Data from the Bureau of Meteorology (BOM) and other national met services via Open-Meteo.
Live data from Open-Meteo · updates automatically ·
San Diego has a mild, semi-arid climate with warm, dry summers and cool, wet winters. Daytime highs usually range from 18°C in January to 26°C in August, while overnight lows stay above 10°C year-round. The live forecast above shows current conditions for today.
What is the typical weather pattern in San Diego?
San Diego’s coastal location keeps temperatures moderate. Summer (June–September) is mostly sunny with sea breezes; winter (December–February) brings occasional rain but rarely frost. The marine layer can create morning low clouds that burn off by afternoon. This pattern is consistent for weather in san diego 10 days and weather in san diego 14 days ahead.
How does San Diego’s climate compare to other parts of California?
Unlike inland areas that see extreme heat, San Diego stays cooler due to the Pacific Ocean. The city averages about 260 sunny days per year. Rainfall is low — around 250 millimetres annually, mostly between November and March. For a broader look, see our California Weather page.
What is the best time to visit San Diego for weather?
Late spring (May–June) and early autumn (September–October) offer warm, dry days and lower tourist crowds. July and August are hottest but still pleasant, while winter is mild but wetter — check san diego weather by month before planning.
Does San Diego get fog often?
Yes, especially in May and June. The “June gloom” brings morning low clouds and fog that clear by midday. This is less common in summer and winter. Hourly forecasts (san diego weather hourly) show when fog is likely.
How accurate are 15-day forecasts for San Diego?
Extended forecasts (e.g., san diego weather 15 day) give a general trend but become less precise beyond 7 days. San Diego’s stable climate means they are often useful for planning, but check the live forecast above for current accuracy.