Surf Forecasts:
Harbor Entrance at Eureka surf forecast from 17 Sep 2026:
- Best quality surf: Monday 21 Sep, 2AM (local time) - 7.5ft (2.3m), 8s period, NNW swell with glassy winds.
- Most powerful swell: Tuesday 22 Sep, 2AM (local time) - 8ft (2.5m), 8s period, NNW swell with 897 kJ wave energy.
- Next surfable swell (1★+): Thursday 17 Sep, 2AM (local time) - 7ft (2.1m), 8s 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 Thursday (Sep 17) at 2AM. The primary swell is predicted to be 2.1m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Harbor Entrance at Eureka in the next 16 days are 2.5m 8s and forecast to arrive on Tuesday (Sep 22) 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 0.6m 16s period and expected on Thursday (Sep 17) at 11PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Thu 17th Sep) | 7ft (2.1m) 8s |
| Best Surf | 2AM (Mon 21st Sep) | 7.5ft (2.3m) 8s |
| Most Powerful | 2AM (Tue 22nd Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Harbor Entrance at Eureka over the next 16 days.
Short Range ForecastMostly dry. Very mild (max 16°C on Thu morning, min 11°C on Sat morning). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 14°C on Sat afternoon, min 12°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | Tuesday 22 | ||||||||||||||
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) | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | SW 19 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | NNW 7 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 452 | 619 | 382 | 322 | 279 | 236 | 369 | 236 | 201 | 307 | 437 | 382 | 447 | 696 | 517 | 493 | 897 | 688 | 688 | 643 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-off | cross-on | cross | glassy | cross-on | cross-on | glassy | on | cross-on | glassy | cross-on | cross-on | glassy | on | cross-on | glassy | on | cross-on | cross-off |
High Tide | 3:23PM1.79m | 5:27AM1.19m | 4:04PM1.71m | 6:53AM1.14m | 4:58PM1.62m | 8:19AM1.16m | 6:09PM1.58m | 9:21AM1.24m | 7:28PM1.58m | 10:03AM1.32m | 8:37PM1.62m | 10:36AM1.42m | 9:33PM1.68m | |||||||
Low Tide | 10:54PM0.19m | 10:13AM1.02m | 11:53PM0.25m | 11:07AM1.13m | 1:01AM0.28m | 12:22PM1.19m | 2:10AM0.26m | 1:47PM1.17m | 3:09AM0.21m | 2:58PM1.08m | 3:57AM0.16m | 3:54PM0.94m | 4:37AM0.12m | |||||||
 |  |  | | | | | | | |  | | | | | | | | | | |
 | — | — | 6:58 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — | 7:03 | — | — | 7:03 | — | — |
 | 7:23 | — | — | 7:22 | — | — | 7:21 | — | — | 7:19 | — | — | 7:17 | — | — | 7:15 | — | — | 7:14 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 16 | 16 | 15 | 15 | 14 | 12 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 14 | 13 | 14 | 14 | 13 |
Feels °C | 12 | 14 | 14 | 13 | 15 | 13 | 12 | 10 | 13 | 12 | 14 | 13 | 11 | 11 | 11 | 12 | 10 | 13 | 12 | 13 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 7 | SW 18 | NNW 7 | SW 18 | SW 19 | NNW 8 | SW 17 | SW 17 | SW 17 | NW 11 | WNW 10 | NNW 8 |
| kJ | 452 | 619 | 382 | 322 | 279 | 235 | 207 | 161 | 193 | 307 | 279 | 314 | 414 | 696 | 423 | 413 | 482 | 263 | 182 | 643 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SW 19 | SW 19 | SW 19 | SW 18 | SSW 13 | SW 18 | SSW 13 | SSW 12 | SW 18 | SSW 12 | S 12 | NW 12 | SW 16 | SW 16 | WNW 10 |
| kJ | 121 | 104 | 100 | 149 | 162 | 236 | 369 | 236 | 201 | 68 | 437 | 33 | 31 | 370 | 29 | 12 | 54 | 318 | 302 | 256 |
Swell 3 Height (m) Direction Period (s) | NW 11 | SW 14 | SW 21 | SW 21 | SW 21 | SSW 15 | SSW 14 | SSW 14 | NW 10 | NW 9 | SSW 13 | S 10 | SW 12 | SSW 12 | — | SW 11 | S 12 | S 12 | S 12 | SW 16 |
| kJ | 31 | 70 | 162 | 162 | 162 | 142 | 120 | 78 | 35 | 13 | 68 | 2 | 6 | 29 | — | 5 | 11 | 11 | 11 | 371 |
Wind waves Height (m) Direction Period (s) | — | — | S 3 | SSW 4 | — | — | — | — | — | NNW 7 | — | NNW 7 | NNW 8 | — | NNW 8 | NNW 8 | NNW 8 | NNW 8 | NNW 8 | — |
| kJ | — | — | 1 | 4 | — | — | — | — | — | 196 | — | 382 | 447 | — | 517 | 493 | 897 | 688 | 688 | — |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 18 | 0 | 21 | 45 | 0 | 112 | 85 | 0 | 112 | 85 | 0 | 106 | 109 | 0 | 112 | 465 | 0 | 112 | 109 | 0 |
Best forecast wave conditions in Humboldt County | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Harbor Entrance at Eureka surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
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