Harbor Entrance at Eureka Surf Break

Lat Long: 40.77° N 124.23° W

Harbor Entrance at Eureka Surf Forecast and Surf Report

Issued: 10 pm 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Harbor Entrance at Eureka sea temperature is
12.5° C
1.3° 

Harbor Entrance at Eureka surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Harbor Entrance at Eureka surf forecast from 5 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 8AM (local time) - 10ft (3.0m), 8s period, NNW swell with glassy winds.
  • Most powerful swell: Monday 10 Aug, 11PM (local time) - 11ft (3.5m), 9s period, NNW swell with 1,895 kJ wave energy.
  • Next surfable swell (1★+): Wednesday 5 Aug, 5AM (local time) - 6ft (1.8m), 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 Wednesday (Aug 05) at 5AM. The primary swell is predicted to be 1.8m and 8s period with a secondary swell of 0.4m and 15s. 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 3.5m 9s and forecast to arrive on Monday (Aug 10) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 16s period and expected on Sunday (Aug 09) at 11AM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Wed 5th Aug)6ft (1.8m) 8s
Best Surf 8AM (Tue 11th Aug)10ft (3.0m) 8s
Most Powerful11PM (Mon 10th Aug)11ft (3.5m) 9s

Table - best surf conditions forecast for Harbor Entrance at Eureka over the next 16 days.


The Lowdown

Alright, surf’s looking pretty average for the next couple of weeks, so let’s not get too carried away. Right now, the Harbor Entrance at Eureka is your only real option, and honestly, it’s not setting the world on fire. We’ve got a bit of a wait for anything decent, so let’s take it day by day.

Right off the bat, Wednesday the 5th is pretty marginal. We’ve got a 5ft NW swell with a short 8-second period, and the cross-shore wind is going to put a bit of chop on it. The energy is moderate, sitting at 426, but it’s not going to be clean. You’ll see a few waves, but it’s a bit of a struggle. Work through Wednesday arvo, it drops slightly to 5ft, but the wind goes a bit more onshore, so it’s not an improvement.

Thursday the 6th, the swell drops right back to 3ft in the morning from the NNW. It’s weak, only 235 energy, so you’re looking at small, crumbly waves. The wind is light, but it’s cross-onshore, so it’s not going to be glassy. This is a bit of a flat spell, not really worth paddling out for. Friday the 7th is similar, with 5ft but a 7-second period and a light cross-onshore. It looks poor, choppy, and weak. Not your day.

Now, Saturday the 8th, we start to see a bit more life. The swell builds to 6ft by the morning and 7ft by the afternoon, but the wind is cross-onshore and the period is still short. There’s more energy—545 in the morning—but it’s still a bit of a mess. This is more of a “have a look” day than a “go for it” day.

Sunday the 9th is where things get serious. The swell jumps to 10ft and the energy is strong, hitting 1060 in the morning and 1164 in the afternoon. This is a solid chunk of swell, so it’s not for the faint-hearted. But the wind is cross-onshore, and it’s going to be choppy. This is expert territory, with size over 8ft, so if you’re not confident, give it a miss. This trend continues into Monday the 10th with 10ft and energy up to 1371. The wind is a bit stronger, but it’s still cross-onshore. Big, powerful, but messy.

Tuesday the 11th stays at 10ft, but the morning wind goes offshore (on) from the NW, which is a big tick. The period is still short at 8 seconds, though, so it might be a bit walled up. Still, with that onshore wind, it could be the cleanest of the big days. The energy is strong at 1187. This might be the pick of the week if you’re an expert.

Wednesday the 12th, the swell starts to drop a bit to 8ft, with similar wind conditions in the morning. It’s still a good size, but the afternoon turns poor with cross-onshore wind. Thursday the 13th drops further to 7ft and the wind is light and offshore in the morning. That could actually be a bit more manageable, with moderate energy around 990. A better option for the advanced crew.

Friday the 14th sees the swell around 7ft, and the afternoon wind eases to a slight air, with a light cross-onshore. It’s still a bit lumpy but more forgiving. Saturday the 15th is a mixed bag: a morning push to 8ft, but the afternoon gets blown out with a moderate breeze. Pick your window. Sunday the 16th looks poor again with cross-onshore winds. Monday the 17th, the swell is back up to 8ft, but the wind is light offshore in the morning, which could be alright. Then Tuesday the 18th, we’re back to 8ft with a light cross-shore. The energy is moderate, around 772.

The last couple of days, Wednesday the 19th and Thursday the 20th, see the swell fade. Wednesday morning has a 6ft and light offshore wind, which might be the most user-friendly of the whole run, but the period is short. Thursday the 20th, it’s down to 5ft and it looks weak and poor.

So, overall, the standout window is that big pulse from the 9th to the 11th, but only if you’re a solid expert and can handle a short-period, heavy, cross-onshore mess. The Tuesday 11th morning might be the pick of the bunch with that offshore wind, but it’s still a beast. For the rest of us, it’s a lot of small, average days with not much to get excited about. Keep an eye on it, but don’t plan your week around it.

Rusty.

Short Range Forecast

Mostly dry. Very mild (max 14°C on Tue night, min 10°C on Thu night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 15°C on Sat afternoon, min 12°C on Fri night). Wind will be generally light.

Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
1
1
1
1
0
1
0
0
2
1
1
3
2
1
3
1
1
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.8
NW
8
1.6
NW
8
1.5
NW
8
1
NNW
8
1
NNW
8
1.1
NNW
8
1.1
NNW
7
1.5
NNW
7
1.6
NNW
7
1.8
NNW
8
1.8
NNW
8
2.1
NNW
8
3
NNW
8
3
NNW
8
3
NNW
9
3.5
NNW
9
3
NNW
9
3
NNW
9
3.5
NNW
9
Wave Graph
Metric surfscale
Energy kJ
428
355
282
110
110
142
131
215
249
362
382
579
1237
1039
1115
1660
1302
1480
1755
Wind (km/h)
10
SSW
15
WSW
10
WSW
5
NE
10
WNW
15
NNW
5
N
10
NNW
15
N
5
SSE
15
NW
15
NNW
10
N
15
NNW
20
N
10
N
15
NNW
20
N
5
N
Wind State
cross-off
cross
cross-on
cross
cross-on
on
cross-on
cross-on
cross-on
off
on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
cross-on
High Tide
5:09AM1.20m
5:09PM1.95m
6:41AM1.09m
6:00PM2.01m
8:24AM1.09m
7:02PM2.05m
9:50AM1.18m
8:09PM2.12m
10:52AM1.30m
9:16PM2.18m
11:40AM1.42m
10:18PM2.23m
Low Tide
11:31PM0.36m
10:51AM0.64m
00:39AM0.22m
11:41AM0.84m
1:51AM0.06m
12:44PM0.99m
3:00AM-0.11m
2:00PM1.07m
4:03AM-0.27m
3:17PM1.06m
4:59AM-0.39m
4:26PM0.98m
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:16
6:16
6:18
6:18
6:20
6:20
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:29
8:28
8:27
8:24
8:23
8:22
8:22
 mm
Temp °C
14
14
14
12
13
14
12
13
14
12
14
15
15
14
14
14
14
14
14
Feels °C
13
12
12
12
12
13
11
11
12
11
12
13
14
12
11
12
11
11
13
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  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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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.

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