Surf Forecasts:
Cape Mendocino surf forecast from 14 Aug 2026:
- Best quality surf: Friday 21 Aug, 5AM (local time) - 2.5ft (0.8m), 14s period, SSW swell with cross-offshore winds.
- Most powerful swell: Saturday 15 Aug, 11AM (local time) - 3.5ft (1.0m), 17s period, SSW swell with 629 kJ wave energy.
- Next surfable swell (1★+): Friday 21 Aug, 5AM (local time) - 2.5ft (0.8m), 14s 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 5AM. The primary swell is predicted to be 0.8m and 14s period with a secondary swell of 0.9m and 11s. 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 17s and forecast to arrive on Saturday (Aug 15) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.1m 8s period and expected on Wednesday (Aug 19) at 5AM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Fri 21st Aug) | 2.5ft (0.8m) 14s |
| Best Surf | 5AM (Fri 21st Aug) | 2.5ft (0.8m) 14s |
| Most Powerful | 11AM (Sat 15th Aug) | 3.5ft (1.0m) 17s |
Table - best surf conditions forecast for Cape Mendocino over the next 16 days.
The Lowdown
Alright, folks, Rusty here. Let’s be straight with you. The next couple of weeks are looking pretty flat and messy around Cape Mendocino. We’ve got a lot of lumpy, cross-shore chop and not a whole lot of push behind it. It’s gonna be a real grind for anyone looking for a proper wave.
Right out of the gate, Friday the 14th and through the weekend, we’re looking at weak, short-period swell in the 2ft to 3ft range. The energy is weak to moderate, with the combined energy readings mostly sitting in the 500s to 600s. Winds are cross-shore and onshore, which is just going to chop things up further. This is not the time to be getting your hopes up; it’s more of a “check the tide and see if it lines up” kind of situation, but honestly, shape is going to be hard to find.
We’ve got a long stretch of poor conditions from Monday the 17th all the way through to Saturday the 23rd. The swell stays weak, around 2ft to 3ft, with some readings dipping lower. The energy drops off into the 300s and 400s, which is pretty weak. The wind is your main enemy here—it’s just constantly cross, chopping up any bit of form the swell might try to put together. It’s going to be a featureless, lumpy mess. I’d say save your energy for something else; this looks better for a kite session than a surf session.
Now, there is a little blip on the radar for Monday the 24th. The swell jumps up to a solid 6ft to 7ft, and the energy reads a strong 708. But don’t get too stoked yet. The period is a short, crumbly 7 seconds, and the wind is still cross-onshore. This is going to be a messy, walled-up, onshore slop-fest. Might have some push, but it won’t be pretty. For most people, it’s a skip.
After that, we’re back to the small stuff. The last few days of the window, from the 25th to the 29th, we see a slight bump in period, with it climbing into the 15-17 second range, which is nice to see, but the height just isn’t there, staying mostly in the 1ft to 2ft range. There is a slight uptick in energy and size toward the very end, especially on the 28th and 29th of August, with readings reaching 3ft to 4ft and energy in the 700s to 900s. This is a long-range, promising sign, but with the cross-shore winds still forecast, it’s still not a sure thing. It's something to keep an eye on, but it's a week and a half out, so let's not start planning the party yet.
All in all, it’s a pretty bleak stretch ahead. Water temps are about average for this time of year, so no surprises there. Don't force it, just keep the board waxed and wait for the ocean to get its act together.
This is Rusty, signing off.
Short Range ForecastMostly dry. Very mild (max 16°C on Fri 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 night). Mainly fresh winds. | ||||||||||||||||||||
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 | SSW 19 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 15 | SSW 15 | SSW 14 | SSW 15 | SSW 16 | WNW 13 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 |
Wave Graph | |||||||||||||||||||||
229 | 212 | 280 | 629 | 505 | 371 | 519 | 512 | 334 | 330 | 334 | 334 | 178 | 249 | 226 | 231 | 309 | 314 | 236 | 223 | 236 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross | cross-off | cross | cross | cross-off | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross | cross-off |
High Tide | 1:36PM1.71m | 1:08AM1.78m | 2:09PM1.74m | 2:00AM1.60m | 2:43PM1.75m | 2:58AM1.41m | 3:18PM1.74m | 4:06AM1.25m | 3:55PM1.71m | 5:35AM1.14m | 4:39PM1.68m | 7:24AM1.13m | 5:31PM1.65m | ||||||||
Low Tide | 7:28PM0.49m | 7:49AM0.06m | 8:19PM0.43m | 8:26AM0.26m | 9:14PM0.38m | 9:04AM0.47m | 10:12PM0.35m | 9:47AM0.67m | 11:15PM0.32m | 10:37AM0.85m | 00:23AM0.29m | 11:45AM0.99m | 1:32AM0.24m | ||||||||
6:26 | — | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:31 | — | — | |
— | 8:15 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | — | 8:10 | — | — | 8:08 | — | — | 8:07 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 15 | 16 | 14 | 16 | 16 | 14 | 15 | 15 | 13 | 15 | 16 | 14 | 16 | 16 | 14 | 15 | 16 | 14 |
Feels °C | 14 | 14 | 12 | 12 | 12 | 10 | 14 | 13 | 10 | 13 | 12 | 9 | 11 | 11 | 11 | 13 | 12 | 11 | 13 | 13 | 11 |
Swell 1 Height (m) Direction Period (s) | NW 7 | SSW 14 | NW 7 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 15 | SSW 15 | SSW 14 | SSW 15 | SSW 16 | WNW 13 | WNW 12 | WNW 12 | NNW 7 | WNW 11 | WNW 11 |
158 | 140 | 119 | 629 | 505 | 371 | 519 | 512 | 334 | 330 | 334 | 334 | 178 | 249 | 226 | 231 | 256 | 260 | 116 | 206 | 164 | |
Swell 2 Height (m) Direction Period (s) | SW 15 | SSW 19 | SSW 18 | WNW 10 | W 10 | SSW 13 | W 10 | WNW 9 | WNW 9 | W 9 | W 8 | W 8 | SSW 17 | WNW 15 | WNW 14 | SSW 16 | SSW 15 | SSW 15 | WNW 11 | SSW 14 | SSW 14 |
229 | 212 | 280 | 37 | 54 | 116 | 47 | 29 | 27 | 40 | 36 | 34 | 101 | 84 | 161 | 142 | 309 | 314 | 221 | 223 | 236 | |
Swell 3 Height (m) Direction Period (s) | SSW 20 | W 10 | SW 14 | WNW 8 | SSE 13 | W 10 | SSE 12 | SSE 12 | S 11 | S 11 | S 11 | WNW 13 | WNW 8 | NW 11 | SSW 13 | SSW 13 | SW 21 | — | SSW 14 | SW 19 | NW 7 |
149 | 19 | 214 | 13 | 31 | 51 | 27 | 27 | 21 | 9 | 9 | 17 | 19 | 5 | 67 | 99 | 18 | — | 236 | 58 | 46 | |
Wind waves Height (m) Direction Period (s) | — | NW 7 | — | NNW 7 | NNW 7 | NNW 7 | NW 6 | NNW 6 | NNW 7 | NNW 7 | NNW 7 | NNW 6 | NNW 6 | NNW 6 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | — | NW 6 | — |
— | 151 | — | 88 | 96 | 74 | 77 | 111 | 158 | 170 | 165 | 91 | 104 | 181 | 419 | 464 | 453 | 228 | — | 56 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 211 | 211 | 51 | 151 | 54 | 40 | 151 | 51 | 40 | 83 | 437 | 40 | 151 | 54 | 40 | 262 | 151 | 40 | 83 | 211 | 40 |
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.











