Surf Forecasts:
Deadman's surf forecast from 14 Aug 2026:
- Best quality surf: Wednesday 19 Aug, 5AM (local time) - 4.5ft (1.4m), 8s period, WNW swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 2AM (local time) - 3.5ft (1.0m), 16s period, SW swell with 502 kJ wave energy.
- Next surfable swell (1★+): Wednesday 19 Aug, 5AM (local time) - 4.5ft (1.4m), 8s period with WNW swell.
Best Forecast Surf Conditions for Deadman's this week:
The surf forecast for Deadman's over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Wednesday (Aug 19) at 5AM. The primary swell is predicted to be 1.4m and 8s period with a secondary swell of 0.6m and 14s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Deadman's in the next 16 days are 1.0m 16s and forecast to arrive on Sunday (Aug 16) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Saturday (Aug 15) at 5PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 19th Aug) | 4.5ft (1.4m) 8s |
| Best Surf | 5AM (Wed 19th Aug) | 4.5ft (1.4m) 8s |
| Most Powerful | 2AM (Sun 16th Aug) | 3.5ft (1.0m) 16s |
Table - best surf conditions forecast for Deadman's over the next 16 days.
The Lowdown
Alright, let’s get into it. The next couple of weeks are looking a bit fickle, to be honest. We’ve got a lot of cross-shore and cross-onshore wind messing things up for the most part, with only a few clean windows to really get excited about. The swell will be there at times, but the wind is going to be the main player in whether it’s worth paddling out.
We’re looking at Deadman's (Big Island) for this whole stretch. First up, this Saturday the 15th, it’s gonna be small and pretty average. The morning has a little bit of life with a 3ft SW swell, but the light cross-shore breeze will put a bit of texture on it. It’s not a total write-off, but it’s more of a longboard or a funboard kind of morning.
Sunday the 16th is much the same – 3ft SW swell in the morning, light cross-shore wind, and a bit of bump on the surface. Again, not terrible, but you’re not gonna be telling your mates about it.
Then we get a proper window on the morning of Tuesday, the 18th of August. The wind drops right out and we get a glassy morning with a 4ft WNW swell. This is the cleanest it’s gonna be for a while, and the surf quality should be decent, with the energy moderate at 379. This is the one to make the most of if you can. The swell direction is WNW, which isn't exactly the NW that’s optimum, but the clean conditions make up for it.
Wednesday the 19th, we see the swell jump up to 6ft from the NW, and the energy is strong at 714. This is a bigger, more powerful swell. The morning has a light cross breeze, so there will be some lines, but it’s getting into that size where it’s for the better surfers. This is pushing towards too big for beginners, so be careful. That NW direction is right in the sweet spot for the spot.
After that, it’s a bit of a mixed bag. The afternoon winds get messy, and there are a few days with onshore chop. The Saturday the 22nd morning has another 6ft NW swell but with a light cross breeze, so it could be a bit of a handful. The energy is strong again at 617, but the quality will be less than Tuesday.
The rest of the run into the end of the month is pretty lackluster. The swell drops off, the wind stays cross or onshore, and there’s a lot of chop on the surface. There is a weak pulse of longer-period SW swell on the 29th, but with the light cross breeze it’s still just marginal. This period is not going to be one for the highlight reel.
Overall, the standout is the Tuesday morning glass-off on the 18th. It’s clean with rideable waves. The Wednesday the 19th has more size and power, but the conditions won't be as clean. Don't write the whole period off, but keep your expectations in check.
Rusty.
Short Range ForecastMostly dry. Very mild (max 17°C on Sun afternoon, min 12°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Tue afternoon, min 12°C on Mon morning). Wind will be generally light. | ||||||||||||||||||||
Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | |||||||||||||||
AM | PM | 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 15 | SW 18 | SW 18 | SW 17 | SW 13 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | WNW 7 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 7 | WNW 7 | WNW 6 | WNW 6 |
Wave Graph | |||||||||||||||||||||
136 | 164 | 252 | 410 | 88 | 502 | 362 | 287 | 309 | 255 | 255 | 278 | 314 | 196 | 191 | 196 | 186 | 222 | 175 | 249 | 218 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross | cross-on | cross | cross | cross-on | cross-on | cross-on | cross-on | cross-on |
High Tide | 1:17PM1.69m | 00:49AM1.76m | 1:50PM1.73m | 1:41AM1.58m | 2:23PM1.75m | 2:38AM1.40m | 2:58PM1.76m | 3:45AM1.25m | 3:35PM1.75m | 5:17AM1.17m | 4:18PM1.74m | 7:24AM1.19m | 5:08PM1.73m | ||||||||
Low Tide | 6:45PM0.45m | 7:05AM0.01m | 7:38PM0.40m | 7:42AM0.23m | 8:33PM0.37m | 8:21AM0.47m | 9:31PM0.36m | 9:05AM0.70m | 10:35PM0.35m | 9:59AM0.90m | 11:43PM0.32m | 11:13AM1.04m | 00:48AM0.28m | ||||||||
6:24 | — | — | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — | |
— | 8:04 | — | — | 8:02 | — | — | 8:00 | — | — | 8:00 | — | — | 7:59 | — | — | 7:58 | — | — | 7:55 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 15 | 15 | 15 | 14 | 15 | 17 | 14 | 14 | 15 | 13 | 14 | 16 | 14 | 15 | 16 | 14 | 15 | 17 | 14 |
Feels °C | 15 | 13 | 13 | 14 | 12 | 12 | 14 | 14 | 11 | 12 | 12 | 10 | 13 | 13 | 12 | 14 | 13 | 11 | 13 | 14 | 10 |
Swell 1 Height (m) Direction Period (s) | WNW 7 | WNW 7 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 15 | SW 14 | WNW 8 | SW 16 | WNW 8 | SW 15 | SW 15 | SW 15 | W 12 | SSW 14 | SSW 14 |
78 | 59 | 252 | 410 | 271 | 502 | 362 | 287 | 309 | 255 | 255 | 169 | 207 | 261 | 191 | 217 | 226 | 183 | 134 | 136 | 138 | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SW 14 | SW 14 | WNW 6 | SW 13 | WNW 6 | WNW 6 | W 10 | WNW 6 | WNW 7 | S 9 | SSW 18 | SW 15 | W 16 | SW 16 | W 13 | W 13 | W 12 | SSW 14 | WSW 19 | SW 20 |
136 | 132 | 167 | 28 | 88 | 38 | 36 | 17 | 30 | 53 | 2 | 33 | 174 | 19 | 125 | 83 | 78 | 96 | 129 | 36 | 15 | |
Swell 3 Height (m) Direction Period (s) | SW 20 | SW 18 | W 13 | W 10 | W 10 | W 10 | W 10 | S 10 | WNW 9 | WNW 9 | W 12 | SW 9 | W 13 | S 8 | SW 13 | SW 21 | SW 21 | — | WSW 19 | SW 19 | W 15 |
97 | 164 | 30 | 18 | 18 | 18 | 17 | 8 | 17 | 25 | 3 | 3 | 3 | 1 | 85 | 17 | 18 | — | 37 | 15 | 4 | |
Wind waves Height (m) Direction Period (s) | — | — | WNW 7 | — | WNW 6 | — | — | WNW 6 | — | — | WNW 8 | WNW 7 | WNW 8 | WNW 8 | — | WNW 8 | WNW 8 | WNW 7 | WNW 7 | WNW 6 | WNW 6 |
— | — | 53 | — | 21 | — | — | 32 | — | — | 135 | 278 | 314 | 196 | — | 196 | 186 | 222 | 175 | 249 | 218 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 103 | 21 | 3 | 47 | 3 | 3 | 47 | 3 | 3 | 102 | 101 | 3 | 102 | 3 | 3 | 102 | 101 | 3 | 101 | 101 |
Best forecast wave conditions in Marin County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Deadman's Surf forecast
The above surf forecast table for Deadman's provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Deadman's can be found by selecting the local surf guide option on the grey menu. Our Deadman's 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 (Deadman's) 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 Deadman's 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.
Deadman's is 6 km (4 miles) from the city of San Francisco. If you plan a vacation in Marin County, look for hotels and other accommodation in San Francisco. San Francisco has rooms for a wide range of budgets as well as car hire and transport links.











