Surf Forecasts:
Stinson Beach surf forecast from 18 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 8AM (local time) - 2.5ft (0.7m), 14s period, SW swell with glassy winds.
- Most powerful swell: Thursday 20 Aug, 11PM (local time) - 6ft (1.8m), 7s period, WNW swell with 343 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 8AM (local time) - 2.5ft (0.7m), 14s period with SW swell.
Best Forecast Surf Conditions for Stinson Beach this week:
The surf forecast for Stinson Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 8AM. The primary swell is predicted to be 0.7m and 14s period with a secondary swell of 1.1m and 7s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Stinson Beach in the next 16 days are 1.8m 7s and forecast to arrive on Thursday (Aug 20) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Wed 19th Aug) | 2.5ft (0.7m) 14s |
| Best Surf | 8AM (Wed 19th Aug) | 2.5ft (0.7m) 14s |
| Most Powerful | 11PM (Thu 20th Aug) | 6ft (1.8m) 7s |
Table - best surf conditions forecast for Stinson Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here with a look at what we’ve got coming down the line at Stinson Beach.
It’s a pretty quiet stretch ahead, to be honest. We’re looking at a long, drawn-out run of small, onshore-slapped waves for the rest of this week and into the next. The conditions are just not playing ball, with a persistent cross-onshore wind messing up what little swell there is. There’s a good week of this to sit through, with nothing really worth paddling out for.
The story picks up on Monday, August 31st, when we finally get a proper morning session. The forecast shows a 7ft swell rolling in from the NW. Now, that size is solid, pushing into expert-only territory. But the kicker is the wind: glassy conditions. That’s a massive positive. It’ll be clean, with the swell energy getting up there at (1030). That late-August morning is the one to circle on the calendar. After that, the winds are set to get lumpy again through the afternoon, so it's a short window.
Before that, there are a few mornings with marginal conditions—like Wednesday the 20th, or the 23rd—with small swell and onshore winds, but they’re not worth getting excited about. The Tuesday the 26th through the 29th has a bit more size, in the 6ft to 8ft range, but those cross-onshore winds just ruin it. It looks more interesting for kite surfing than paddle surfing on those days.
So, to sum it up: put your head down for a week, and be ready for that glassy Monday the 31st. That’s the standout.
Rusty.
Short Range ForecastMostly dry. Very mild (max 18°C on Tue afternoon, min 11°C on Mon night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 17°C on Fri afternoon, min 12°C on Fri night). Wind will be generally light. | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | |
Swell Height Map |  |  |  |  |  |  |  | ||||||||||||
Wave Height (m) Direction Period (s) | SW 14 | SW 15 | SW 16 | SSW 14 | SW 15 | SW 15 | WNW 7 | SSW 14 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 6 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | SW 18 | SW 18 |
Wave Graph  | |||||||||||||||||||
 kJ | 169 | 220 | 208 | 127 | 217 | 223 | 222 | 134 | 165 | 286 | 186 | 247 | 155 | 142 | 142 | 174 | 157 | 127 | 113 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross | on | cross-on | cross-on | on | on | on |
High Tide | 4:24AM0.89m | 4:13PM1.22m | 5:53AM0.82m | 4:57PM1.19m | 7:43AM0.81m | 5:49PM1.18m | 9:11AM0.86m | 6:48PM1.17m | 10:06AM0.91m | 7:48PM1.19m | 10:45AM0.95m | 8:43PM1.22m | |||||||
Low Tide | 10:49PM0.21m | 10:24AM0.41m | 11:52PM0.19m | 11:15AM0.52m | 1:00AM0.17m | 12:22PM0.60m | 2:08AM0.14m | 1:41PM0.64m | 3:09AM0.10m | 2:51PM0.64m | 4:01AM0.06m | 3:46PM0.61m | 4:44AM0.03m | ||||||
 | | |  |  | | | | |  | | |  | | | | | | | |
 | — | 6:28 | — | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — |
 | 8:00 | — | 8:00 | — | — | 7:58 | — | — | 7:57 | — | — | 7:55 | — | — | 7:53 | — | — | 7:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 13 | 15 | 18 | 13 | 17 | 18 | 13 | 17 | 17 | 15 | 16 | 17 | 14 | 17 | 17 | 13 | 16 | 17 | 14 |
Feels °C | 11 | 14 | 17 | 10 | 17 | 16 | 10 | 15 | 15 | 12 | 13 | 13 | 11 | 17 | 15 | 11 | 15 | 16 | 13 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 15 | SW 16 | WNW 7 | WNW 7 | SW 15 | SW 15 | W 12 | W 12 | SSW 14 | W 11 | SSW 13 | SSW 13 | WNW 8 | SW 17 | WNW 8 | WNW 8 | WNW 8 | WNW 8 |
| kJ | 169 | 220 | 208 | 127 | 134 | 223 | 183 | 134 | 132 | 138 | 58 | 68 | 68 | 142 | 102 | 174 | 157 | 127 | 99 |
Swell 2 Height (m) Direction Period (s) | WNW 6 | WNW 6 | WNW 8 | SSW 14 | SW 15 | W 12 | W 11 | SSW 14 | SSW 14 | W 11 | SW 14 | SW 18 | WNW 10 | SW 13 | SW 13 | SW 12 | SW 19 | SW 18 | SSW 15 |
| kJ | 30 | 34 | 37 | 123 | 217 | 74 | 91 | 129 | 136 | 62 | 93 | 49 | 35 | 44 | 43 | 38 | 130 | 114 | 86 |
Swell 3 Height (m) Direction Period (s) | WNW 9 | WNW 8 | SSW 13 | SW 17 | W 13 | SW 21 | — | WSW 19 | SW 19 | SW 20 | SW 18 | SW 18 | SW 18 | SW 17 | W 12 | SW 19 | SSW 16 | SW 12 | SW 18 |
| kJ | 26 | 22 | 66 | 70 | 82 | 18 | — | 37 | 14 | 15 | 51 | 49 | 48 | 47 | 12 | 55 | 50 | 38 | 113 |
Wind waves Height (m) Direction Period (s) | — | — | WNW 7 | — | — | WNW 8 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 7 | WNW 6 | — | WNW 8 | — | — | — | — |
| kJ | — | — | 50 | — | — | 138 | 222 | 113 | 165 | 286 | 186 | 247 | 155 | — | 142 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 4 | 4 | 57 | 4 | 18 | 119 | 18 | 4 | 118 | 18 | 119 | 118 | 18 | 18 | 119 | 18 | 18 | 101 | 18 |
Best forecast wave conditions in Marin County | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the Stinson Beach Surf forecast
The above surf forecast table for Stinson Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Stinson Beach can be found by selecting the local surf guide option on the grey menu. Our Stinson Beach surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Stinson Beach) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).
Further information to help with frequently asked questions about our surf forecast for Stinson Beach may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.
Stinson Beach is 10 km (6 miles) from the city of Corte Madera. If you plan a vacation in Marin County, look for hotels and other accommodation in Corte Madera. Corte Madera has rooms for a wide range of budgets as well as car hire and transport links.
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