Surf Forecasts:
Harbor Entrance at Eureka surf forecast from 23 Aug 2026:
- Best quality surf: Sunday 23 Aug, 11PM (local time) - 6ft (1.9m), 8s period, NNW swell with glassy winds.
- Most powerful swell: Saturday 29 Aug, 2AM (local time) - 7ft (2.1m), 7s period, NNW swell with 482 kJ wave energy.
- Next surfable swell (1★+): Sunday 23 Aug, 8PM (local time) - 6ft (1.8m), 7s period with NW swell.
Best Forecast Surf Conditions for Harbor Entrance at Eureka this week:
The surf forecast for Harbor Entrance at Eureka over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 23) at 8PM. The primary swell is predicted to be 1.8m and 7s period with a secondary swell of 0.4m and 18s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Harbor Entrance at Eureka in the next 16 days are 2.1m 7s and forecast to arrive on Saturday (Aug 29) at 2AM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 18s period and expected on Saturday (Aug 29) at 2PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Sun 23rd Aug) | 6ft (1.8m) 7s |
| Best Surf | 11PM (Sun 23rd Aug) | 6ft (1.9m) 8s |
| Most Powerful | 2AM (Sat 29th Aug) | 7ft (2.1m) 7s |
Table - best surf conditions forecast for Harbor Entrance at Eureka over the next 16 days.
The Lowdown
Alright, surfers, let’s talk about what’s coming up for the next couple of weeks. I’m looking at this stretch and, honestly, it’s a bit of a quiet one. The swell is small, the wind is mostly cross or cross-onshore, and the surf is just not cooperating. You’d think a place like Harbor Entrance at Eureka would fire, but this run is a long, flat spell.
We’ve got a real gap here. From this Sunday, the 23rd of August, all the way through to early September, the waves are mostly poor or marginal. The swells are tiny—mostly under 3 ft—with short periods around 7 or 8 seconds, and the wind is never really offshore. The water temp is about average for this time of year, nothing to write home about.
The first real hint of something happening doesn’t come until Wednesday the 2nd of September. The morning shows a marginal surf with a 6 ft swell from the NW, period 9 seconds, and the combined energy is moderate at 636. The wind is still cross-onshore though, so it’s going to be a bit choppy. Not the best, but it’s the only thing that scores a 1 out of 10 in the whole run.
Then, the 3rd of September afternoon sees a long-period groundswell from the SW at 19 seconds and 3 ft, but the energy is strong at 1043. The problem is the wind is howling from the north at 30 km/h, making it lumpy and cross-onshore. That’s more of a kite day than a paddle day at this beach-and-harbormouth setup.
The end of the forecast period, around the 6th and 7th of September, shows some bigger swell—up to 12 ft from the NNW on the 6th afternoon—but it’s short period at 9 seconds, with strong energy (1747) and cross-onshore winds. That’s expert-only territory, and messy with it.
Look, this is a tough stretch. The area is fairly consistent, so a blank run like this is unusual, but it’s happening. Forecasts can change, so keep an eye on it, but for now, there’s nothing to get excited about. Stick with it.
Rusty.
Short Range ForecastMostly dry. Very mild (max 16°C on Mon morning, min 12°C on Sat night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 15°C on Wed morning, min 11°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Sunday 23 | Monday 24 | Tuesday 25 | Wednesday 26 | Thursday 27 | Friday 28 | ||||||||||||||
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) | NW 7 | NNW 7 | SW 18 | NNW 8 | SW 18 | SW 18 | SW 17 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | SW 14 | NW 7 | NW 7 | NW 7 | NNW 7 |
Wave Graph | |||||||||||||||||||
79 | 146 | 215 | 403 | 311 | 194 | 183 | 267 | 216 | 161 | 203 | 201 | 149 | 134 | 136 | 206 | 251 | 251 | 482 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-on | cross-off | cross | cross | cross-off | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | on | cross-on | glassy |
High Tide | 8:06PM1.71m | 10:48AM1.26m | 9:06PM1.76m | 11:25AM1.34m | 9:57PM1.82m | 11:56AM1.41m | 10:42PM1.87m | 12:23PM1.49m | 11:23PM1.89m | 12:48PM1.57m | 00:02AM1.88m | 1:11PM1.66m | 00:42AM1.83m | ||||||
Low Tide | 3:55AM0.13m | 3:15PM1.12m | 4:42AM0.05m | 4:12PM1.05m | 5:21AM-0.02m | 4:59PM0.95m | 5:56AM-0.06m | 5:41PM0.84m | 6:28AM-0.07m | 6:22PM0.71m | 6:57AM-0.03m | 7:02PM0.58m | |||||||
— | 6:33 | — | — | 6:35 | — | — | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | |
8:05 | — | 8:02 | — | — | 8:01 | — | — | 8:00 | — | — | 7:59 | — | — | 7:57 | — | — | 7:55 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 15 | 14 | 16 | 15 | 14 | 15 | 16 | 13 | 15 | 15 | 14 | 14 | 14 | 13 | 13 | 13 | 13 |
Feels °C | 13 | 12 | 13 | 14 | 14 | 13 | 13 | 14 | 16 | 12 | 13 | 13 | 13 | 12 | 11 | 11 | 11 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | NW 7 | SW 19 | NW 7 | NNW 8 | NW 7 | NW 7 | NW 7 | SW 16 | SW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SW 15 | WNW 8 | SW 14 | SW 16 | SW 17 | SSW 19 |
79 | 131 | 204 | 403 | 242 | 147 | 63 | 267 | 216 | 161 | 203 | 201 | 149 | 134 | 136 | 130 | 268 | 281 | 322 | |
Swell 2 Height (m) Direction Period (s) | WNW 9 | WNW 9 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | NW 6 | NNW 6 | S 13 | W 13 | W 7 | W 7 | S 13 | SW 14 | S 12 | SW 13 | SW 13 | SW 13 |
46 | 27 | 215 | 112 | 311 | 194 | 183 | 38 | 22 | 87 | 89 | 28 | 24 | 85 | 132 | 69 | 62 | 61 | 61 | |
Swell 3 Height (m) Direction Period (s) | SSW 12 | SSW 15 | SSW 12 | SSW 16 | S 14 | S 14 | S 14 | S 13 | S 13 | WNW 8 | W 8 | W 12 | W 12 | NW 9 | S 13 | W 10 | S 11 | S 11 | W 10 |
61 | 75 | 29 | 84 | 106 | 106 | 104 | 89 | 89 | 35 | 29 | 75 | 44 | 36 | 78 | 35 | 41 | 22 | 16 | |
Wind waves Height (m) Direction Period (s) | NNE 3 | NNW 7 | — | — | — | — | — | — | — | NNW 6 | NNW 6 | NNW 5 | N 5 | WNW 8 | NNW 4 | NW 7 | NW 7 | NW 7 | NNW 7 |
1 | 146 | — | — | — | — | — | — | — | 18 | 10 | 6 | 5 | 88 | 4 | 206 | 251 | 251 | 482 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 18 | 274 | 85 | 0 | 45 | 52 | 0 | 113 | 112 | 18 | 112 | 112 | 18 | 345 | 464 | 0 | 112 | 464 | 0 |
Best forecast wave conditions in Humboldt County | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
Header Global | |||||||||||||||||||
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Information about the Harbor Entrance at Eureka Surf forecast
The above surf forecast table for Harbor Entrance at Eureka provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Harbor Entrance at Eureka can be found by selecting the local surf guide option on the grey menu. Our Harbor Entrance at Eureka 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 (Harbor Entrance at Eureka) 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 Harbor Entrance at Eureka 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.
Harbor Entrance at Eureka is 8 km (5 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.











