Third Reef Surf Break

Lat Long: 40.03° N 124.08° W

Third Reef Surf Forecast and Surf Report

Issued: 4 pm 05 Aug 2026 (local time)

Forecast update in  hr  min

Today's Third Reef sea temperature is
12.1° C
1.8° 

Third Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Third Reef surf forecast from 6 Aug 2026:

  • Best quality surf: Monday 10 Aug, 5AM (local time) - 6ft (1.9m), 9s period, NW swell with cross-offshore winds.
  • Most powerful swell: Monday 10 Aug, 8AM (local time) - 8ft (2.5m), 9s period, NW swell with 1,107 kJ wave energy.
  • Next surfable swell (1★+): Thursday 6 Aug, 2AM (local time) - 1.5ft (0.5m), 14s period with SW swell.

Best Forecast Surf Conditions for Third Reef this week:

The surf forecast for Third Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 06) at 2AM. The primary swell is predicted to be 0.5m and 14s period with a secondary swell of 0.7m and 9s. Another secondary swell of 0.6m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Third Reef in the next 16 days are 2.5m 9s and forecast to arrive on Monday (Aug 10) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 13s period and expected on Monday (Aug 10) at 11PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 2AM (Thu 6th Aug)1.5ft (0.5m) 14s
Best Surf 5AM (Mon 10th Aug)6ft (1.9m) 9s
Most Powerful 8AM (Mon 10th Aug)8ft (2.5m) 9s

Table - best surf conditions forecast for Third Reef over the next 16 days.


The Lowdown

Alright, Rusty here. Let’s talk about Third Reef.

Looking at the next 16 days, we’ve got a whole lot of swell but the wind is mostly coming from the side and onshore, which is gonna chop things up. There’s a big dead patch with no real good surf, so don’t plan on anything great for the first week. The second half of the window is where it gets interesting.

The big swells hit around the weekend of August 7th through the 9th, but the wind is bad. Expect a lot of poor conditions with cross-onshore winds and moderate breezes. The swell gets up to 7ft on Sunday afternoon, but with that wind, it’s a battle. The combined energy is strong, hitting 889 (strong wave energy) on Sunday, but it’s not for paddle surfing.

The one that catches my eye is the afternoon of Wednesday, August 19th. The wind goes glassy, and that’s a huge win. We’ll have a 6ft swell from the NW with a 6-second period. That’s a short period wind swell, but with glassy conditions, it’s going to be a whole lot more fun than anything else. The combined energy is 622 (moderate wave energy), but the clean surface will make it rideable. This spot is fairly consistent, so expect a few friends out there.

Then, Thursday afternoon, August 20th, is the real standout. Again, glassy conditions with a 6ft swell from the NW, and the combined energy is a bit higher at 655 (moderate wave energy). The water temperature is 54°F, which is a bit colder than normal, so you’ll need a thick suit.

The rest of the run is just so-so. The swell direction is mostly from the NW, which is the best direction for this reef break, but the wind is usually cross-onshore. There are a few mornings with a light cross-shore or offshore wind, but the swell is smaller then. The swell period is often around 9 seconds, which is fine, but nothing special.

If you’ve got the patience, wait for the 19th and 20th. The early stuff is just not worth the paddle.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 21°C on Sat morning, min 13°C on Wed night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Sat afternoon, min 13°C on Sat night). Wind will be generally light.

Wed
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
2
1
0
1
0
2
1
0
0
1
0
1
2
1
1
1
1
2
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
NW
9
0.5
SW
14
0.5
SW
13
0.5
SW
13
0.6
SSW
13
0.4
SW
18
0.4
SSW
18
0.5
SW
16
0.6
SSW
17
1.9
NW
7
1.4
NW
8
1.7
NW
9
2.1
NW
9
1.8
NW
9
1.8
NW
9
2.1
NW
9
1.9
NW
9
2
NW
9
2.2
NW
9
2.1
NW
9
Wave Graph
Metric surfscale
Energy kJ
115
95
87
85
113
88
133
133
237
375
250
437
639
564
497
702
599
626
753
721
Wind (km/h)
5
S
5
N
5
WSW
5
WNW
5
N
10
WNW
5
NW
10
N
20
NW
25
NNW
15
N
20
NW
15
NW
15
N
15
NW
10
NW
15
N
15
NW
10
NW
15
NNE
Wind State
cross
glassy
glassy
cross-on
glassy
cross-on
glassy
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross-off
High Tide
4:34PM1.87m
6:09AM1.15m
5:24PM1.94m
7:52AM1.15m
6:25PM2.00m
9:17AM1.22m
7:32PM2.07m
10:17AM1.32m
8:38PM2.14m
11:04AM1.42m
9:40PM2.20m
11:46AM1.52m
10:37PM2.21m
Low Tide
11:53PM0.24m
10:43AM0.80m
1:04AM0.09m
11:43AM0.93m
2:13AM-0.06m
12:59PM1.00m
3:17AM-0.21m
2:19PM1.00m
4:13AM-0.33m
3:32PM0.93m
5:03AM-0.38m
4:37PM0.81m
part cloud
clear
part cloud
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:18
6:18
6:20
6:20
6:22
6:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:24
8:23
8:22
8:22
8:21
8:19
8:17
 mm
Temp °C
16
14
14
15
15
18
16
17
21
27
22
18
18
20
18
18
19
17
17
19
Feels °C
16
14
14
14
15
16
15
16
17
22
18
15
16
16
16
16
16
15
16
16
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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 Third Reef Surf forecast

The above surf forecast table for Third Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Third Reef can be found by selecting the local surf guide option on the grey menu. Our Third Reef 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 (Third Reef) 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 Third Reef 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.

Third Reef is 85 km (53 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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