Surf Forecasts:
Cape Mendocino surf forecast from 21 Aug 2026:
- Best quality surf: Wednesday 26 Aug, 11PM (local time) - 2.5ft (0.8m), 14s period, SSE swell with cross-offshore winds.
- Most powerful swell: Thursday 27 Aug, 2PM (local time) - 3.5ft (1.0m), 16s period, S swell with 476 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 8PM (local time) - 1.5ft (0.5m), 13s period with SSW swell.
Best Forecast Surf Conditions for Cape Mendocino this week:
The surf forecast for Cape Mendocino over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Friday (Aug 21) at 8PM. The primary swell is predicted to be 0.5m and 13s period with a secondary swell of 0.6m and 10s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Cape Mendocino in the next 16 days are 1.0m 16s and forecast to arrive on Thursday (Aug 27) at 2PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.8m 8s period and expected on Sunday (Aug 23) at 11PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Fri 21st Aug) | 1.5ft (0.5m) 13s |
| Best Surf | 11PM (Wed 26th Aug) | 2.5ft (0.8m) 14s |
| Most Powerful | 2PM (Thu 27th Aug) | 3.5ft (1.0m) 16s |
Table - best surf conditions forecast for Cape Mendocino over the next 16 days.
The Lowdown
Alright, Rusty here, lookin' at the charts for Cape Mendocino. Mate, I'm gonna be straight with you—this 16-day stretch is a tough one. We're lookin' at a real quiet spell with nothing but small, messy waves and cross-shore winds pretty much the whole way through. The water's sittin' at 55°, which is a bit colder than normal for this time of year, so you'll want the thickest wetsuit you've got.
The best we've got is a tiny window starting Friday, the 21st of August. It's not much, but it's the only thing that's surfable. Friday morning, you'll find some small 2-foot SSW groundswell with a long 14-second period. The wind is a light 6 mph WNW breeze, which is onshore, but it's light enough that you might get a few clean ones. The combined swell energy is weak (284). It's marginal, but it's the best bet in a dry spell. The following days are pretty much a write-off. From Saturday, the 22nd, through to the 5th of September, we're looking at a long stretch of poor, cross-shore winds and tiny surf. The swell energy stays weak, with most readings below 500. There's a pulse of NW windswell on the 23rd and 24th, with a 6-foot and 5-foot swell, but the period is a short 7-8 seconds and the wind is a messy cross-shore, so it's going to be a lumpy, close-out mess. That's more of a kite-surfing setup than a paddling one. There's a glimmer of hope on the 29th of August—a 3-foot SSW swell with an 18-second period, giving a moderate energy of 937, but the fresh cross-shore winds will chop it up again. The trend continues into September, with a 7-foot NW swell on the 2nd of September, but again, it's cross-onshore and choppy. Honestly, the only real window is that Friday morning. The rest of the time, save your energy and wait for a better forecast. The pattern is poor, but it can't stay this bad forever.
Rusty
Short Range ForecastMostly dry. Very mild (max 19°C on Sat afternoon, min 13°C on Sat night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 17°C on Mon morning, min 12°C on Mon night). Wind will be generally light. | ||||||||||||||||||||
Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | |||||||||||||||
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) | WNW 11 | SSW 13 | SSW 13 | SSW 13 | SW 18 | SSW 13 | SW 19 | NW 7 | SW 18 | NW 8 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SSE 14 | SSE 14 | S 13 | S 14 | S 13 |
Wave Graph | |||||||||||||||||||||
156 | 139 | 98 | 99 | 111 | 94 | 231 | 301 | 199 | 305 | 192 | 232 | 326 | 214 | 206 | 203 | 280 | 304 | 225 | 399 | 340 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross-off | cross | cross | cross-off | cross | cross | cross | cross | cross | cross-off | cross | cross-on | cross | cross | cross | cross-off | cross | cross | cross-off |
High Tide | 8:53AM1.20m | 6:30PM1.65m | 9:48AM1.27m | 7:30PM1.67m | 10:27AM1.34m | 8:25PM1.72m | 10:58AM1.38m | 9:14PM1.77m | 11:24AM1.42m | 9:58PM1.81m | 11:48AM1.47m | 10:40PM1.82m | 12:11PM1.52m | 11:21PM1.80m | |||||||
Low Tide | 1:04PM1.05m | 2:33AM0.18m | 2:14PM1.05m | 3:24AM0.11m | 3:09PM1.01m | 4:07AM0.05m | 3:54PM0.95m | 4:43AM0.01m | 4:33PM0.87m | 5:15AM-0.01m | 5:10PM0.79m | 5:45AM-0.01m | 5:45PM0.69m | ||||||||
6:33 | — | — | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | |
— | 8:06 | — | — | 8:05 | — | — | 8:02 | — | — | 8:01 | — | — | 8:00 | — | — | 7:59 | — | — | 7:57 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 16 | 16 | 15 | 18 | 19 | 16 | 16 | 17 | 14 | 17 | 16 | 14 | 15 | 15 | 13 | 16 | 17 | 15 | 17 | 18 | 14 |
Feels °C | 15 | 15 | 14 | 16 | 17 | 13 | 12 | 13 | 10 | 16 | 14 | 12 | 12 | 12 | 12 | 14 | 14 | 12 | 14 | 15 | 11 |
Swell 1 Height (m) Direction Period (s) | WNW 11 | NNW 8 | NNW 8 | NNW 7 | WNW 10 | SSW 13 | SW 19 | SW 18 | NW 8 | NW 8 | NW 8 | NW 7 | NW 6 | NNW 6 | SW 16 | SW 16 | SSE 14 | SSE 14 | S 13 | S 14 | S 13 |
128 | 76 | 74 | 48 | 54 | 90 | 231 | 164 | 368 | 305 | 229 | 109 | 59 | 34 | 206 | 203 | 280 | 304 | 225 | 399 | 340 | |
Swell 2 Height (m) Direction Period (s) | NNW 7 | WNW 10 | WNW 10 | WNW 10 | SSW 13 | WNW 9 | SSW 15 | S 16 | S 16 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | S 13 | SSE 15 | SW 16 | SW 15 | W 11 | SW 15 | SW 14 |
42 | 83 | 78 | 54 | 98 | 47 | 75 | 76 | 124 | 255 | 192 | 232 | 326 | 214 | 125 | 181 | 201 | 183 | 92 | 104 | 130 | |
Swell 3 Height (m) Direction Period (s) | SSW 14 | SSW 13 | SSW 13 | SSW 13 | SW 18 | SW 16 | WNW 9 | SSW 12 | SW 18 | S 14 | S 14 | S 14 | S 13 | S 13 | W 14 | W 13 | W 12 | W 12 | SW 15 | W 12 | W 12 |
156 | 139 | 98 | 99 | 111 | 94 | 26 | 30 | 199 | 106 | 153 | 146 | 126 | 126 | 102 | 85 | 77 | 71 | 104 | 68 | 42 | |
Wind waves Height (m) Direction Period (s) | — | NW 8 | — | — | NNW 8 | NNW 7 | NW 7 | NW 7 | — | — | — | — | — | — | NNW 6 | NNW 6 | NNW 4 | N 3 | NNW 4 | NW 5 | NW 8 |
— | 23 | — | — | 72 | 114 | 193 | 301 | — | — | — | — | — | — | 33 | 25 | 10 | 4 | 18 | 51 | 267 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 152 | 438 | 0 | 59 | 436 | 51 | 244 | 54 | 21 | 211 | 86 | 0 | 294 | 86 | 21 | 152 | 151 | 0 | 151 | 436 | 51 |
Best forecast wave conditions in Humboldt County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Cape Mendocino Surf forecast
The above surf forecast table for Cape Mendocino provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Cape Mendocino can be found by selecting the local surf guide option on the grey menu. Our Cape Mendocino 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 (Cape Mendocino) 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 Cape Mendocino 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.
Cape Mendocino is 47 km (29 miles) from Eureka. If you plan a vacation in Humboldt County, look for hotels and other accommodation in Eureka. Eureka has rooms for a wide range of budgets as well as car hire and transport links.











