
Surf Forecasts:
Harbor Entrance at Eureka surf forecast from 18 Jul 2026:
- Best quality surf: Saturday 18 Jul, 11PM (local time) - 6ft (1.9m), 8s period, NW swell with glassy winds.
- Most powerful swell: Friday 24 Jul, 5PM (local time) - 3ft (0.9m), 24s period, SW swell with 801 kJ wave energy.
- Next surfable swell (1★+): Saturday 18 Jul, 5AM (local time) - 3ft (0.9m), 16s period with WNW 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 Saturday (Jul 18) at 5AM. The primary swell is predicted to be 0.9m and 16s period with a secondary swell of 1.3m and 6s. 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 0.9m 24s and forecast to arrive on Friday (Jul 24) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 14s period and expected on Tuesday (Jul 21) at 11PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Sat 18th Jul) | 3ft (0.9m) 16s |
| Best Surf | 11PM (Sat 18th Jul) | 6ft (1.9m) 8s |
| Most Powerful | 5PM (Fri 24th Jul) | 3ft (0.9m) 24s |
Table - best surf conditions forecast for Harbor Entrance at Eureka over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s cooking for the next couple of weeks.
Honestly, it’s a bit of a mixed bag for the Harbor Entrance at Eureka. We’ve got some swell on the charts, but it’s fighting a lot of messy wind and questionable conditions. The real standout looks like it’ll be Sunday the 19th, with a solid punch of swell and the best chance of getting something semi-decent, but even then, it’s not a perfect window.
The earliest we see any wave energy is Saturday morning the 18th. There’s a 3 ft WNW groundswell with a very long 16-second period, giving us moderate energy (956). The wind is light and onshore from the NW, so it’ll be a bit bumpy. It’s a harbor mouth setup, so that long period might actually wrap in a bit better than a beach break, but the conditions are only marginal. That afternoon, the swell drops to 3 ft from the SW with a super long 18-second period, and the cross-onshore wind makes it choppy. Not great.
Now, Sunday the 19th is the best bet. The morning brings a 6 ft NW swell, but the period is short at 8 seconds, so it’ll be a bit crumbly. The wind is light and onshore, so it’s not glassy. The energy is moderate (888). The afternoon gets a bit better with a 7 ft NW swell and the same short period, with a touch more energy (1115). The wind stays light onshore. It’s not world-class, but it’s your best window for a wave that’s at least rideable. It’s getting close to the 8 ft mark, so it’s more for the advanced crew.
The rest of the first week is a struggle. Monday the 20th has some 5 ft to 6 ft NW swell, but the wind is light cross-shore, making it bumpy. The energy is moderate but dropping. From Tuesday the 21st through Thursday the 24th, we’re in a funk. The swell hangs around 3 ft to 5 ft with short periods, and the wind is just bad enough to keep things messy. Tuesday afternoon is the only glimmer—a 4 ft NW swell with glassy conditions from the NE. That’s a rare moment of clean, but the energy is weak (151), so you’ll be scratching for a ride.
The following week gets more interesting but also more challenging. Friday the 24th has a morning 7 ft NNW swell with a short period and a cross-onshore breeze, making it choppy. That afternoon, the swell drops to 3 ft, but it’s from the SW with a *very* long 24-second period, giving us strong energy (1543). That’s a lot of juice for a small wave, but the wind is cross-onshore again. The 30th of July sees a 10 ft NNW swell, but that’s big (over 8 ft), so it’s experts only, and the cross-onshore wind will make it a messy, powerful beast. The energy is very strong (1426). That’s more of a kite-surfing day than a paddle surf session.
The last few days into August show a continuing trend of 8 ft to 8 ft NNW swells with short periods and light onshore or cross-onshore winds. It’s consistent in size but not in quality. The correct direction (NW) is there, but the wind is just never clean enough to make it a true standout.
So, to wrap it up: if you’re an advanced surfer and you’re itching for a paddle, Sunday the 19th is your best shot. Get out there. The rest of the period is a mix of messy, small, or too big with the wrong wind. Keep an eye on the charts, but don’t hold your breath.
Rusty.
Short Range ForecastMostly dry. Very mild (max 14°C on Sat afternoon, min 11°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryMostly dry. Very mild (max 19°C on Wed morning, min 13°C on Mon night). Wind will be generally light. | ||||||||||||||||||
Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | ||||||||||||||
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) | WNW 16 | WNW 16 | SW 18 | NW 8 | NW 8 | NW 8 | NNW 8 | NW 8 | NW 8 | SW 16 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NNW 9 | NNW 8 | SW 26 |
Wave Graph | |||||||||||||||||||
499 | 481 | 370 | 557 | 475 | 571 | 601 | 428 | 330 | 302 | 196 | 151 | 151 | 158 | 158 | 151 | 258 | 261 | 421 | |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | on | cross-on | cross-off | on | on | glassy | cross | cross | cross | cross-on | glassy | glassy | cross-on | cross | cross-off | cross-on | on | cross-on |
High Tide | 2:49AM1.83m | 4:11PM1.82m | 3:46AM1.58m | 4:51PM1.86m | 4:51AM1.34m | 5:31PM1.87m | 6:08AM1.16m | 6:14PM1.86m | 7:38AM1.07m | 7:00PM1.85m | 9:09AM1.08m | 7:49PM1.83m | |||||||
Low Tide | 9:18PM0.69m | 9:43AM-0.09m | 10:18PM0.62m | 10:21AM0.15m | 11:21PM0.55m | 11:01AM0.40m | 00:27AM0.46m | 11:42AM0.64m | 1:34AM0.36m | 12:30PM0.84m | 2:38AM0.25m | 1:27PM1.00m | 3:37AM0.14m | ||||||
— | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | |
8:45 | — | 8:45 | — | — | 8:44 | — | — | 8:43 | — | — | 8:43 | — | — | 8:42 | — | — | 8:40 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 13 | 14 | 13 | 14 | 14 | 13 | 13 | 14 | 14 | 16 | 16 | 16 | 19 | 17 | 15 | 17 | 17 | 15 |
Feels °C | 10 | 11 | 12 | 12 | 13 | 13 | 12 | 12 | 13 | 13 | 15 | 15 | 15 | 19 | 16 | 14 | 17 | 17 | 15 |
Swell 1 Height (m) Direction Period (s) | NNW 6 | NW 7 | WNW 16 | NW 8 | NW 8 | NW 8 | NNW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NNW 9 | SSW 14 | NNW 9 |
80 | 178 | 353 | 557 | 475 | 571 | 601 | 428 | 330 | 244 | 196 | 151 | 151 | 158 | 158 | 151 | 258 | 183 | 377 | |
Swell 2 Height (m) Direction Period (s) | WNW 16 | WNW 16 | SW 18 | WNW 16 | WNW 15 | SW 17 | SW 17 | SSW 16 | SW 16 | SW 16 | SW 16 | SW 15 | SSW 14 | S 12 | S 11 | S 10 | SSW 14 | WNW 9 | SSW 14 |
499 | 481 | 370 | 348 | 256 | 358 | 424 | 318 | 291 | 302 | 248 | 232 | 325 | 280 | 184 | 88 | 180 | 56 | 180 | |
Swell 3 Height (m) Direction Period (s) | NW 12 | SW 17 | NW 10 | SW 19 | SW 16 | WNW 14 | WNW 14 | WNW 14 | WNW 13 | S 13 | S 12 | S 12 | S 11 | SSW 15 | SSW 14 | SSW 14 | S 8 | S 8 | SW 26 |
68 | 297 | 52 | 175 | 157 | 186 | 163 | 158 | 101 | 117 | 141 | 134 | 85 | 146 | 133 | 166 | 49 | 31 | 421 | |
Wind waves Height (m) Direction Period (s) | — | — | NW 7 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NNW 8 | — |
— | — | 258 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 261 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 112 | 83 | 0 | 112 | 83 | 0 | 4 | 45 | 21 | 33 | 0 | 0 | 21 | 83 | 0 | 113 | 112 | 18 |
Best forecast wave conditions in Humboldt County | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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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.










