
Surf Forecasts:
Deadman's surf forecast from 12 Sep 2026:
- Best quality surf: Tuesday 15 Sep, 2AM (local time) - 8ft (2.5m), 9s period, NW swell with cross-offshore winds.
- Most powerful swell: Tuesday 15 Sep, 2AM (local time) - 8ft (2.5m), 9s period, NW swell with 1,149 kJ wave energy.
- Next surfable swell (1★+): Monday 14 Sep, 2AM (local time) - 5ft (1.6m), 7s 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 Monday (Sep 14) at 2AM. The primary swell is predicted to be 1.6m and 7s period with a secondary swell of 0.4m and 13s. Another secondary swell of 0.4m and 19s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Deadman's in the next 16 days are 2.5m 9s and forecast to arrive on Tuesday (Sep 15) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 16s period and expected on Thursday (Sep 17) at 11AM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 14th Sep) | 5ft (1.6m) 7s |
| Best Surf | 2AM (Tue 15th Sep) | 8ft (2.5m) 9s |
| Most Powerful | 2AM (Tue 15th Sep) | 8ft (2.5m) 9s |
Table - best surf conditions forecast for Deadman's over the next 16 days.
The Lowdown
Alright, let me break this down. Looking at the whole 16-day window for Deadman's, it's a weird run. There's a lot of onshore wind and messy conditions to sift through, with just a few bright spots. The water's sitting at a very unusual 66°, which is much warmer than normal for this time of year.
The first few days are pretty much a write-off. Saturday and Sunday the 12th and 13th are dominated by a fresh cross-onshore breeze, making the surf poor and lumpy. The energy is there, with the combined swell energy hitting 410 to 478, but it's all wind-affected junk.
Monday morning the 14th, things finally go glassy. The wind drops to 3 mph from the west, and we get a clean 5 ft swell from the WNW with a 9-second period. The combined energy is a strong 475. This is the first real chance for a paddle, with clean, glassy conditions. It'll be decent, but the afternoon winds pick up again and ruin it.
Tuesday morning the 15th is another clean window with a light cross-offshore breeze and 5 ft of WNW swell. Again, the morning is the only time to go before the onshore winds trash it.
There's a big gap of poor to marginal conditions from Wednesday the 16th through to Monday the 21st. The energy is mostly moderate to strong, but the wind is just not playing ball, with onshore or cross-shore chop most of the time. Some of these swells are long-period groundswell pushing 17 to 19 seconds, but they're just not lining up with the wind.
Now, the standout. Tuesday the 22nd morning is back to glassy conditions, with 3 mph winds and a 5 ft WNW swell. The energy is a strong 644. This will be clean and fun.
But the real winner is Wednesday the 23rd of September. This is the one to circle. We’re looking at a 7 ft swell from the WNW with a very long period of 12 seconds, and a combined energy reading of 1295—that's a powerful groundswell. The morning comes with a light cross-offshore breeze and clean conditions. For an advanced break like Deadman's, this is the best on offer. That 7 ft swell is solid, and with that period and clean wind, it's going to be excellent. It's over the 5 ft mark, so it'll be a handful for beginners, but for the experienced crew, this is the day.
Thursday the 24th morning is also good, with a clean 4 ft swell, but it's not quite the same as Wednesday.
The last few days of the window drop back into smaller, weaker, and choppier conditions. Friday the 25th morning has a tiny, glassy 2 ft swell from the SW with a 14-second period, which might give a few clean little runners on the right tide, but it's pretty small.
So, to wrap it up: the first week is a bust except for the clean mornings on the 14th, 15th, and the glass-off on the 22nd. The absolute standout is the morning of Wednesday the 23rd of September. That's the one to wait for.
Rusty
Short Range ForecastMostly dry. Very mild (max 18°C on Sun afternoon, min 14°C on Sat morning). Winds decreasing (fresh winds from the W on Sat afternoon, calm by Sun night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 18°C on Wed afternoon, min 14°C on Tue morning). Wind will be generally light. | ||||||||||||||||||||
Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | |||||||||||||||
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 14 | WNW 6 | SW 14 | SW 13 | WNW 6 | WNW 7 | WNW 9 | WNW 8 | NW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | SW 17 | WNW 8 | WNW 8 | SW 16 | SW 15 | SW 19 | SW 19 | SW 19 |
Wave Graph | |||||||||||||||||||||
203 | 231 | 128 | 113 | 209 | 235 | 336 | 433 | 1149 | 313 | 181 | 202 | 153 | 145 | 76 | 58 | 121 | 104 | 236 | 236 | 133 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | on | cross-on | glassy | glassy | cross-on | cross-off | cross-off | cross | cross | cross | cross | cross | cross | cross | cross-on | cross-on | cross-on | cross-on |
High Tide | 12:26PM1.77m | 00:46AM1.59m | 12:55PM1.78m | 1:38AM1.47m | 1:25PM1.78m | 2:35AM1.36m | 1:57PM1.76m | 3:43AM1.28m | 2:35PM1.73m | 5:17AM1.24m | 3:21PM1.69m | 7:13AM1.28m | 4:17PM1.65m | ||||||||
Low Tide | 6:25PM0.18m | 6:29AM0.35m | 7:09PM0.15m | 7:05AM0.56m | 7:55PM0.17m | 7:42AM0.77m | 8:45PM0.21m | 8:26AM0.95m | 9:42PM0.27m | 9:28AM1.09m | 10:49PM0.30m | 10:58AM1.16m | 11:59PM0.29m | ||||||||
6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — | |
— | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:17 | — | — | 7:15 | — | — | 7:15 | — | — | 7:13 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 17 | 16 | 16 | 18 | 16 | 18 | 18 | 15 | 16 | 17 | 15 | 16 | 18 | 15 | 17 | 18 | 15 | 16 | 17 | 14 |
Feels °C | 13 | 12 | 11 | 13 | 13 | 12 | 18 | 16 | 13 | 15 | 14 | 13 | 14 | 15 | 13 | 16 | 16 | 13 | 16 | 13 | 12 |
Swell 1 Height (m) Direction Period (s) | SW 14 | SW 14 | SW 14 | SW 13 | SW 13 | SW 13 | WNW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | SW 15 | WNW 10 | SW 19 | SW 19 |
203 | 198 | 123 | 113 | 87 | 61 | 336 | 281 | 686 | 313 | 181 | 202 | 153 | 92 | 76 | 58 | 44 | 104 | 64 | 236 | 133 | |
Swell 2 Height (m) Direction Period (s) | WSW 14 | WSW 18 | WSW 12 | WNW 10 | SW 19 | SW 19 | SW 13 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 17 | WNW 11 | SSW 16 | SW 16 | WNW 8 | SW 19 | WNW 10 | SW 13 |
75 | 31 | 29 | 38 | 58 | 92 | 61 | 77 | 77 | 93 | 88 | 63 | 87 | 145 | 23 | 166 | 121 | 23 | 236 | 37 | 45 | |
Swell 3 Height (m) Direction Period (s) | WNW 12 | SW 22 | WSW 21 | WSW 11 | WSW 11 | WSW 10 | SW 18 | SW 13 | SW 12 | SW 12 | W 13 | SSW 20 | SSW 19 | WNW 12 | SW 14 | WNW 11 | WNW 10 | NW 10 | SW 14 | SW 14 | S 10 |
14 | 18 | 42 | 12 | 12 | 10 | 78 | 42 | 23 | 23 | 31 | 37 | 72 | 27 | 49 | 38 | 21 | 25 | 103 | 53 | 19 | |
Wind waves Height (m) Direction Period (s) | WNW 6 | WNW 6 | NW 6 | NW 5 | WNW 6 | WNW 7 | — | WNW 8 | NW 9 | — | — | — | — | — | — | — | — | — | — | W 3 | WNW 4 |
118 | 231 | 128 | 67 | 209 | 235 | — | 433 | 1149 | — | — | — | — | — | — | — | — | — | — | 5 | 16 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 102 | 103 | 94 | 101 | 103 | 2 | 2 | 101 | 3 | 3 | 222 | 3 | 3 | 53 | 20 | 53 | 119 | 3 | 3 | 102 | 3 |
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.










