
Surf Forecasts:
Cape Mendocino surf forecast from 11 Sep 2026:
- Best quality surf: Saturday 12 Sep, 8AM (local time) - 3ft (0.9m), 15s period, SSW swell with cross-offshore winds.
- Most powerful swell: Sunday 13 Sep, 8PM (local time) - 6.5ft (2.0m), 9s period, NW swell with 585 kJ wave energy.
- Next surfable swell (1★+): Saturday 12 Sep, 8AM (local time) - 3ft (0.9m), 15s 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 (Sep 12) at 8AM. The primary swell is predicted to be 0.9m and 15s period with a secondary swell of 1.2m and 9s. 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 2.0m 9s and forecast to arrive on Sunday (Sep 13) at 8PM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 2.3m 8s period and expected on Monday (Sep 14) at 8AM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Sat 12th Sep) | 3ft (0.9m) 15s |
| Best Surf | 8AM (Sat 12th Sep) | 3ft (0.9m) 15s |
| Most Powerful | 8PM (Sun 13th Sep) | 6.5ft (2.0m) 9s |
Table - best surf conditions forecast for Cape Mendocino over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down Cape Mendocino for the next couple of weeks. Gotta be honest, it’s a long, slow grind before we catch a real moment. The first week and a half is pretty tough, with cross-shore winds messin' up the small waves that roll in.
The one bright spot in this whole 16-day window shows up at the very end. On Friday the 25th of September, we finally get a window of calm. Cape Mendocino is the only break in play, and it’s exposed to that SW direction. The morning of Friday the 25th is still a bit messy with cross-onshore wind, but by the afternoon, the wind goes dead flat – glassy as a mirror. That’s the surface we all want. The swell is a clean 2ft from the SW, with a super long 21-second period. That’s deep ocean groundswell, packing plenty of energy (combined energy at 618) – it’ll have some real push and shape, but that long period might make it a bit straight on the beach. The water is sittin’ around 55°F, which is nearly 4°F colder than normal for this time of year – so you’ll want the thick rubber.
Honestly, that late Friday session is the only one I’d circle on the calendar. The rest of the forecast is full of moderate to fresh cross-shore breezes from the N and NNW, with swell staying tiny – 1ft to 3ft – and only brief glimpses of marginal surf. There’s a glassy morning on Wednesday the 16th of September with a 2ft SW swell and 16-second period, but the energy is only 346, and it didn’t score high enough to call it a standout.
So, it’s a tough run. There’s a big stretch of poor or marginal conditions from now all the way to the 25th. If you’ve got patience, that final afternoon could be a little gem – but it’s a long ways out, so keep watch. For now, the waves are mostly poor. The water is cooler than average, so you’ll feel the bite.
Stay frothy,
Rusty
Short Range ForecastMostly dry. Very mild (max 17°C on Thu morning, min 12°C on Fri night). Winds decreasing (fresh winds from the N on Fri afternoon, light winds from the N by Sat night). | Days 4-6 Weather SummaryMostly dry. Very mild (max 16°C on Sun afternoon, min 12°C on Sun night). Mainly fresh winds. | ||||||||||||||||||||
Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | Monday 14 | Tuesday 15 | Wednesday 16 | |||||||||||||||
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 17 | SSW 17 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | SW 14 | SW 14 | NW 9 | NW 8 | NW 7 | SW 17 | SW 17 | SW 17 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SSW 18 |
Wave Graph | |||||||||||||||||||||
419 | 493 | 496 | 477 | 465 | 418 | 407 | 301 | 293 | 332 | 306 | 465 | 107 | 106 | 147 | 140 | 122 | 87 | 155 | 121 | 104 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross | cross | cross-off | cross-on | cross-on | cross-off | cross | cross | cross | cross | cross | cross | cross | cross | cross | glassy | cross | glassy |
High Tide | 11:44AM1.71m | 11:23PM1.85m | 12:15PM1.76m | 00:14AM1.74m | 12:45PM1.78m | 1:04AM1.62m | 1:14PM1.78m | 1:56AM1.48m | 1:43PM1.76m | 2:54AM1.35m | 2:16PM1.72m | 4:02AM1.24m | 2:53PM1.66m | ||||||||
Low Tide | 5:37PM0.42m | 6:00AM0.06m | 6:22PM0.30m | 6:36AM0.21m | 7:07PM0.22m | 7:11AM0.38m | 7:51PM0.17m | 7:46AM0.56m | 8:37PM0.16m | 8:24AM0.74m | 9:27PM0.17m | 9:07AM0.90m | 10:23PM0.21m | ||||||||
6:52 | — | — | 6:54 | — | — | 6:54 | — | — | 6:56 | — | — | 6:56 | — | — | 6:58 | — | — | 6:58 | — | — | |
— | 7:35 | — | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — | — | 7:27 | — | — | 7:24 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 17 | 17 | 14 | 16 | 16 | 13 | 15 | 16 | 15 | 15 | 16 | 14 | 15 | 16 | 13 | 16 | 16 | 13 | 17 | 17 | 15 |
Feels °C | 14 | 14 | 10 | 12 | 11 | 9 | 12 | 13 | 13 | 11 | 12 | 10 | 10 | 11 | 9 | 12 | 12 | 9 | 17 | 16 | 16 |
Swell 1 Height (m) Direction Period (s) | SW 17 | SSW 17 | SW 16 | SW 16 | SW 15 | SW 15 | NW 9 | NW 10 | NW 10 | NW 8 | SW 13 | SSW 13 | SW 13 | SW 17 | SW 17 | SW 17 | SW 16 | NNW 7 | NW 7 | NW 7 | NW 7 |
419 | 493 | 496 | 477 | 465 | 418 | 178 | 256 | 150 | 143 | 142 | 116 | 84 | 106 | 147 | 140 | 122 | 237 | 135 | 102 | 99 | |
Swell 2 Height (m) Direction Period (s) | WNW 11 | WNW 11 | S 10 | S 9 | WNW 9 | WNW 10 | SW 14 | SW 14 | SW 14 | SW 14 | NW 9 | SW 19 | SW 17 | SW 13 | SW 12 | WNW 13 | NW 13 | SW 16 | SW 16 | SW 16 | SSW 18 |
157 | 146 | 125 | 54 | 59 | 55 | 407 | 301 | 293 | 186 | 21 | 127 | 107 | 83 | 39 | 69 | 42 | 87 | 155 | 121 | 104 | |
Swell 3 Height (m) Direction Period (s) | S 11 | S 10 | NW 10 | WNW 10 | S 8 | WSW 15 | WNW 11 | WSW 13 | WNW 10 | NW 9 | SW 19 | WNW 16 | WSW 9 | WNW 15 | WNW 13 | SW 12 | SW 12 | WNW 12 | WNW 12 | S 19 | SW 14 |
81 | 45 | 100 | 64 | 33 | 85 | 79 | 33 | 86 | 70 | 57 | 25 | 8 | 84 | 17 | 38 | 23 | 57 | 56 | 109 | 72 | |
Wind waves Height (m) Direction Period (s) | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 7 | NNW 9 | — | — | — | NW 9 | NW 8 | NW 7 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | — | — | — | — |
160 | 183 | 214 | 263 | 217 | 312 | — | — | — | 332 | 306 | 465 | 530 | 572 | 575 | 464 | 382 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 151 | 51 | 40 | 151 | 436 | 40 | 75 | 152 | 0 | 151 | 436 | 45 | 262 | 436 | 40 | 151 | 294 | 40 | 0 | 40 | 0 |
Best forecast wave conditions in Humboldt County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
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.










