5-day weather forecast San Francisco 28-08-2026
Weather forecast San Francisco Friday, August 28 28.08.2026: overcast, temperature from 15 °C to 18 °C.
Precipitation probability 28%. Wind up to 7.11 m/s (gusts 9.53 m/s). Air humidity 71–88%, atmospheric pressure 760–762 mm Hg, UV index up to 5.
Weather Alerts
Hide alertsSmall Craft Advisory issued August 26 at 2:50AM PDT until August 28 at 9:00AM PDT by NWS San Francisco CA
Small Craft Advisory
* WHAT...Northwest winds 15 to 25 kt with gusts up to 35 kt.
* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.
* WHEN...Until 9 AM PDT Friday.
* IMPACTS...Conditions will be hazardous to small craft.
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
Small Craft Advisory issued August 26 at 8:28AM PDT until August 28 at 9:00AM PDT by NWS San Francisco CA
Small Craft Advisory
* WHAT...Northwest winds 15 to 25 kt with occasional gusts up to
35 kt.
* WHERE...Waters from Point Reyes to Pigeon Point 10-60 NM.
* WHEN...Until 9 AM PDT Friday.
* IMPACTS...Conditions will be hazardous to small craft.
Inexperienced mariners, especially those operating smaller
vessels, should avoid navigating in hazardous conditions.
5 days at a glance — tap a day to open it
Sunrise 06:36
Sunset 19:45
Sunset 19:45
Full Moon98% illuminated
Moonrise 20:05 · Moonset 07:15
Moonrise 20:05 · Moonset 07:15
Chart
Table
| Temperature | Rain chance | Cloud cover | Humidity | Pressure | Wind | UV Index | ||
|---|---|---|---|---|---|---|---|---|
| 00:00 |  Overcast | 16 °C | 23% | 100% | 80% | 761 mm Hg | SW 235° 6.11 (8.22) m/s | 0 |
| 01:00 | Overcast | 16 °C | 24% | 100% | 81% | 761 mm Hg | W 263° 5.69 (8) m/s | 0 |
| 02:00 | Overcast | 16 °C | 25% | 100% | 82% | 760 mm Hg | W 268° 4 (6.22) m/s | 0 |
| 03:00 | Overcast | 15 °C | 26% | 100% | 84% | 760 mm Hg | W 275° 4.69 (7.11) m/s | 0 |
| 04:00 | Overcast | 16 °C | 25% | 100% | 82% | 760 mm Hg | WSW 245° 2 (3.86) m/s | 0 |
| 05:00 | Overcast | 16 °C | 26% | 100% | 84% | 760 mm Hg | WSW 238° 3.61 (4.83) m/s | 0 |
| 06:00 | Overcast | 15 °C | 28% | 100% | 87% | 761 mm Hg | WSW 248° 3.89 (5.19) m/s | 0 |
| 07:00 |  Overcast | 15 °C | 28% | 100% | 88% | 761 mm Hg | WSW 252° 4 (5.14) m/s | 3 |
| 08:00 | Overcast | 15 °C | 27% | 100% | 86% | 761 mm Hg | WSW 245° 3.39 (4.11) m/s | 4 |
| 09:00 | Overcast | 15 °C | 27% | 100% | 85% | 761 mm Hg | WSW 249° 4.39 (5.42) m/s | 4 |
| 10:00 | Overcast | 15 °C | 27% | 100% | 85% | 761 mm Hg | W 260° 4.31 (5.31) m/s | 4 |
| 11:00 | Overcast | 16 °C | 23% | 91% | 82% | 762 mm Hg | WSW 241° 4.19 (4.72) m/s | 4 |
| 12:00 | Overcast | 16 °C | 22% | 100% | 78% | 762 mm Hg | WSW 250° 4.5 (4.89) m/s | 4 |
| 13:00 |  Sunny | 17 °C | 8% | 9% | 75% | 762 mm Hg | WSW 255° 5.39 (5.92) m/s | 5 |
| 14:00 | Sunny | 17 °C | 7% | 10% | 74% | 762 mm Hg | W 260° 5.61 (6.83) m/s | 5 |
| 15:00 | Sunny | 17 °C | 7% | 15% | 71% | 761 mm Hg | W 261° 6.39 (7.81) m/s | 5 |
| 16:00 | Sunny | 18 °C | 7% | 15% | 71% | 761 mm Hg | W 269° 7.11 (9.03) m/s | 5 |
| 17:00 | Sunny | 17 °C | 7% | 15% | 72% | 761 mm Hg | W 277° 7.11 (9.53) m/s | 5 |
| 18:00 | Sunny | 17 °C | 9% | 14% | 77% | 761 mm Hg | W 280° 6.39 (9.33) m/s | 5 |
| 19:00 | Sunny | 16 °C | 10% | 12% | 81% | 761 mm Hg | W 280° 5.61 (8.03) m/s | 5 |
| 20:00 |  Clear | 15 °C | 12% | 5% | 85% | 761 mm Hg | W 277° 4.81 (7.22) m/s | 0 |
| 21:00 | Clear | 15 °C | 12% | 3% | 86% | 761 mm Hg | W 275° 4.89 (7.5) m/s | 0 |
| 22:00 | Clear | 15 °C | 12% | 7% | 87% | 761 mm Hg | W 272° 5.39 (7.92) m/s | 0 |
| 23:00 | Clear | 15 °C | 12% | 5% | 87% | 761 mm Hg | W 275° 5.89 (8.53) m/s | 0 |
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Data Sources & Methodology
Our weather forecasts are powered by a professional weather data provider that aggregates data from national weather services, satellite observations, radar networks, and over 80,000 weather stations worldwide. Forecast data is updated multiple times daily. We convert raw data into clear summaries — wind speed in m/s, pressure in mmHg — so you can plan your day with confidence.