Surf Forecasts:
Cape Mendocino surf forecast from 12 Aug 2026:
- Best quality surf: Sunday 16 Aug, 5AM (local time) - 3.5ft (1.1m), 16s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 16 Aug, 5AM (local time) - 3.5ft (1.1m), 16s period, SSW swell with 627 kJ wave energy.
- Next surfable swell (1★+): Saturday 15 Aug, 5AM (local time) - 2.5ft (0.7m), 18s 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 Saturday (Aug 15) at 5AM. The primary swell is predicted to be 0.7m and 18s period. 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 1.1m 16s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.5m 8s period and expected on Wednesday (Aug 12) at 8AM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 15th Aug) | 2.5ft (0.7m) 18s |
| Best Surf | 5AM (Sun 16th Aug) | 3.5ft (1.1m) 16s |
| Most Powerful | 5AM (Sun 16th Aug) | 3.5ft (1.1m) 16s |
Table - best surf conditions forecast for Cape Mendocino over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's have a look at what's cookin' up at Cape Mendocino over the next couple of weeks. Gotta be straight with you, this stretch is lookin' pretty grim for paddlers.
The whole 16-day run is plagued by cross-shore winds and choppy conditions. The energy in the water is there, with moderate readings in the 250 to 660 range, but it's all blown out. There's no clean, glassy day in sight, and the swell is mostly weak, hovering between 2 ft and 4 ft. Only on Thursday the 13th afternoon and Monday the 24th afternoon does it push past 5 ft, but those are short-period, lumpy messes. Honestly, this setup looks more interesting for a kite surfer than a paddle surfer.
The first few days are a total write-off. Wednesday the 12th and Thursday the 13th mornings are just poor. The combined swell energy is moderate (265 to 244), but with a 30 km/h cross-shore, it's a lumpy cross-chop. Not worth paddling out.
Things don't get any better through the weekend. Friday the 14th to Sunday the 16th are all "marginal" at best. We're seeing 2 ft to 4 ft of SSW swell with moderate energy (565 to 659), but the wind remains cross or light cross-onshore. The waves are just choppy and weak.
Heading into the new week, it's more of the same. Monday the 17th through Thursday the 20th offer no relief. The swell is small, and the wind is still doing us no favors. The only highlight might be Wednesday the 19th morning with a light breeze and a combined swell energy of 541, but it's still onshore and small.
The second week is a total washout. From Friday the 21st right through to the end, it's all "poor surf conditions." The combined swell energy drops at times into the 250 range, and the wind is a relentless cross-shore from the NNW at 20-30 km/h. There's a brief pulse of 6 ft on the 26th, but it's a short-period NW windswell with a fresh cross-shore. No good.
So, what's the best on offer? Honestly, there isn't one standout day. The least worst option is probably the morning of Sunday the 16th, with 4 ft of SSW swell and a light 10 km/h cross-onshore, giving it a combined energy of 659. It's not clean by any stretch, but it's the tidiest the water gets. For anyone really keen, the Wednesday morning of the 19th might also be worth a look with a gentle breeze and similar 3 ft swell. But seriously, don't hold your breath.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Wed afternoon, min 13°C on Tue night). Winds decreasing (fresh winds from the N on Tue night, light winds from the NNW by Fri morning). | Days 5-7 Weather SummaryMostly dry. Very mild (max 16°C on Sun morning, min 12°C on Sat night). Wind will be generally light. | ||||||||||||||||||
Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | ||||||||||||||
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) | SSW 18 | SSW 18 | SW 17 | SSW 16 | SW 16 | NW 8 | NW 7 | NW 7 | NW 7 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 |
Wave Graph | |||||||||||||||||||
209 | 207 | 137 | 173 | 206 | 418 | 289 | 229 | 212 | 280 | 576 | 505 | 407 | 612 | 512 | 443 | 437 | 330 | 330 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross-off | cross | cross | cross-off | cross-on | cross-on | cross | on | cross-on | glassy |
High Tide | 10:34PM2.09m | 12:26PM1.60m | 11:26PM2.05m | 1:02PM1.66m | 00:17AM1.94m | 1:36PM1.71m | 1:08AM1.78m | 2:09PM1.74m | 2:00AM1.60m | 2:43PM1.75m | 2:58AM1.41m | 3:18PM1.74m | 4:06AM1.25m | ||||||
Low Tide | 5:51AM-0.32m | 5:45PM0.68m | 6:32AM-0.24m | 6:36PM0.58m | 7:11AM-0.11m | 7:28PM0.49m | 7:49AM0.06m | 8:19PM0.43m | 8:26AM0.26m | 9:14PM0.38m | 9:04AM0.47m | 10:12PM0.35m | |||||||
— | 6:24 | — | — | 6:26 | — | — | 6:26 | — | — | 6:28 | — | — | 6:28 | — | — | 6:30 | — | — | |
8:20 | — | 8:19 | — | — | 8:17 | — | — | 8:15 | — | — | 8:15 | — | — | 8:14 | — | — | 8:12 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 15 | 16 | 15 | 14 | 15 | 14 | 15 | 16 | 14 | 14 | 15 | 14 | 16 | 16 | 14 | 16 | 16 | 14 |
Feels °C | 12 | 11 | 12 | 12 | 11 | 12 | 11 | 13 | 14 | 11 | 11 | 12 | 10 | 15 | 15 | 13 | 16 | 15 | 14 |
Swell 1 Height (m) Direction Period (s) | SSW 18 | SSW 18 | SW 17 | SSW 16 | SW 16 | SW 16 | NW 7 | NW 7 | SSW 14 | NW 7 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 14 | SSW 14 | SSW 14 |
209 | 207 | 137 | 173 | 206 | 201 | 289 | 222 | 140 | 122 | 576 | 505 | 407 | 612 | 512 | 443 | 437 | 330 | 330 | |
Swell 2 Height (m) Direction Period (s) | WNW 8 | SW 13 | SSW 13 | SSW 13 | WNW 12 | WNW 12 | SW 16 | SW 15 | SSW 19 | SSW 18 | WNW 11 | W 10 | NNW 7 | NNW 7 | W 9 | W 9 | W 9 | W 9 | W 8 |
40 | 44 | 68 | 102 | 29 | 29 | 245 | 229 | 212 | 280 | 37 | 55 | 66 | 42 | 45 | 45 | 41 | 40 | 35 | |
Swell 3 Height (m) Direction Period (s) | SW 14 | WNW 12 | WNW 13 | WNW 13 | S 11 | S 11 | WNW 12 | SSW 20 | W 11 | SW 14 | SSE 12 | SSE 13 | W 10 | W 10 | SSE 12 | NW 7 | NW 6 | NW 6 | NNW 6 |
53 | 14 | 32 | 33 | 9 | 9 | 26 | 149 | 20 | 214 | 15 | 31 | 51 | 47 | 27 | 22 | 10 | 9 | 6 | |
Wind waves Height (m) Direction Period (s) | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NW 8 | — | — | NW 7 | — | NW 7 | NNW 7 | — | — | NW 7 | — | — | — | — |
574 | 636 | 452 | 798 | 618 | 418 | — | — | 193 | — | 122 | 127 | — | — | 47 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 40 | 289 | 294 | 54 | 188 | 437 | 40 | 211 | 54 | 45 | 151 | 211 | 0 | 146 | 54 | 40 | 51 | 54 | 0 |
Best forecast wave conditions in Humboldt County | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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.











