Surf Forecasts:
How big are the waves at Francis Beach today (21 Aug):
- Morning surf: Morning surf (21 Aug, local time) - 1.5ft (0.5m), 14s period with SW swell.
- Afternoon surf: Afternoon surf (21 Aug, local time) - 2ft (0.6m), 11s period with W swell.
- Evening surf: Evening surf (21 Aug, local time) - 1.5ft (0.4m), 13s period with SSW swell.
The current surf forecast for Francis Beach at 4AM is: 0.5m 14s primary swell from a Southwest direction and 0.6m 11s secondary swell from a West direction, 0.6m 5s secondary swell from a West-northwest direction (forecast issued at 10:00pm August 20). The wind direction is predicted to be cross-onshore.
| Time (PDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (21 Aug) | 1.5ft (0.5m) | 14s |
| Afternoon (21 Aug) | 2ft (0.6m) | 11s |
| Evening (21 Aug) | 1.5ft (0.4m) | 13s |
Table - waves today at Francis Beach. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 18°C on Sat afternoon, min 13°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Thu 20 | Friday 21 | Saturday 22 | ||||||||||||||||
8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | 2 AM | 5 AM | 8 AM | 11 AM | 2 PM | 5 PM | 8 PM | 11 PM | |
Swell Height Map |  |  |  |  |  |  |  | |||||||||||
Wave Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 14 | SW 14 | SW 14 | W 11 | W 11 | SW 18 | SW 18 | SSW 13 | SSW 13 | SW 18 | SW 18 | SW 18 | SW 13 | WNW 6 | WNW 6 | WNW 7 |
Wave Graph  | ||||||||||||||||||
 kJ | 138 | 138 | 138 | 102 | 99 | 83 | 82 | 68 | 68 | 68 | 68 | 68 | 50 | 49 | 47 | 55 | 132 | 215 |
Wind (km/h) | ||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 8:15AM1.14m | 5:52PM1.59m | 9:10AM1.21m | 6:52PM1.61m | ||||||||||||||
Low Tide | 00:41AM0.24m | 12:13PM1.05m | 1:42AM0.18m | 1:23PM1.05m | ||||||||||||||
 |  | | |  |  | | |  | | | | | | | | | | |
 | — | — | — | 6:30 | — | — | — | — | — | — | — | 6:31 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 7:53 | — | — | — | — | — | — | — | 7:52 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 13 | 13 | 14 | 16 | 17 | 16 | 14 | 13 | 13 | 13 | 14 | 17 | 18 | 17 | 15 | 15 |
Feels °C | 11 | 11 | 11 | 11 | 12 | 14 | 14 | 13 | 12 | 12 | 12 | 12 | 13 | 15 | 16 | 14 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 11 | W 10 | W 10 | WNW 5 | WNW 5 | W 10 | W 10 | WNW 10 | WNW 10 | WNW 10 | WNW 6 | WNW 7 |
| kJ | 89 | 86 | 85 | 85 | 83 | 83 | 82 | 56 | 55 | 15 | 22 | 51 | 50 | 33 | 33 | 33 | 130 | 215 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | WNW 5 | WNW 5 | SW 14 | SW 14 | SSW 14 | SSW 13 | SSW 13 | SSW 13 | W 10 | W 10 | SSW 13 | SW 13 | SW 13 | SW 13 | SW 13 | SW 17 | SW 16 |
| kJ | 138 | 19 | 15 | 102 | 99 | 74 | 70 | 68 | 68 | 53 | 52 | 68 | 44 | 44 | 44 | 43 | 70 | 67 |
Swell 3 Height (m) Direction Period (s) | SW 20 | SSW 14 | SSW 14 | SW 20 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SSW 13 | SSW 13 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 13 | SW 12 |
| kJ | 15 | 138 | 138 | 15 | 14 | 52 | 50 | 49 | 49 | 68 | 68 | 48 | 48 | 49 | 47 | 46 | 41 | 39 |
Wind waves Height (m) Direction Period (s) | WNW 6 | — | NW 6 | WNW 5 | WNW 5 | WNW 5 | WNW 5 | WNW 5 | WNW 5 | — | NW 5 | NW 5 | WNW 5 | WNW 5 | WNW 5 | WNW 6 | NW 6 | — |
| kJ | 34 | — | 28 | 18 | 24 | 23 | 21 | 19 | 15 | — | 19 | 29 | 22 | 21 | 22 | 55 | 132 | — |
Nearest Offshore or Glassy | ||||||||||||||||||
Distance (km) | 57 | 32 | 32 | 55 | 32 | 40 | 68 | 68 | 65 | 32 | 32 | 32 | 32 | 55 | 66 | 66 | 40 | 40 |
Best forecast wave conditions in San Mateo | ||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||
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