Third Reef Surf Break

Lat Long: 40.03° N 124.08° W

Third Reef Surf Forecast and Surf Report

Issued: 10 am 04 Aug 2026 (local time)

Forecast update in  hr  min

Today's Third Reef sea temperature is
12.5° C
1.4° 

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 4 Aug 2026:

  • Best quality surf: Friday 7 Aug, 8PM (local time) - 5ft (1.6m), 7s period, NW swell with glassy winds.
  • Most powerful swell: Tuesday 11 Aug, 11AM (local time) - 8ft (2.5m), 9s period, NW swell with 937 kJ wave energy.
  • Next surfable swell (1★+): Tuesday 4 Aug, 5PM (local time) - 4.5ft (1.3m), 8s period with NW 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 Tuesday (Aug 04) at 5PM. The primary swell is predicted to be 1.3m and 8s period with a secondary swell of 0.4m and 15s. 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 Tuesday (Aug 11) at 11AM. Winds are predicted to be cross-onshore 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+) 5PM (Tue 4th Aug)4.5ft (1.3m) 8s
Best Surf 8PM (Fri 7th Aug)5ft (1.6m) 7s
Most Powerful11AM (Tue 11th Aug)8ft (2.5m) 9s

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


The Lowdown

Alright folks, Rusty here. Let’s have a look at what’s cookin’ for Third Reef over the next couple of weeks.

The first couple of days are actually pretty promising, then we hit a long, ugly stretch of onshore junk before things clean up again in the second week. Keep your eyes on Tuesday afternoon and that far-off window around the 14th and 15th – those are the real standouts.

Tuesday morning, August 4th, kicks things off with some waist-to-chest high waves around 5 ft out of the NW. The combined energy is solid, sitting at 443 (moderate), and the 9-second period means it’s got a bit of push. The water’s running a bit colder than normal for this time of year, sitting at 55°F with a 3°F anomaly, so you’ll want a good steamer. The wind’s light and cross-off from the SSE at 6 mph, so it’ll be pretty clean. Not a bad way to start.

But the real gem is Tuesday afternoon, August 4th. The wind goes glassy, straight up WSW at just 3 mph, and you’re looking at 4 ft of NW swell. The wave energy is still moderate at 349, but that glassy surface is a major plus. That’s the session you wanna be in the water for.

Wednesday, August 5th, is a step down. The swell drops to 3 ft and the wind goes cross from the S at 6 mph. It’s marginal, with combined energy dropping to 247. Still rideable if you’re keen, but nothin’ to write home about. Thursday the 6th is a write-off – tiny, weak swell and onshore wind.

Then from Friday the 7th all the way through to Tuesday the 11th, it’s mostly poor. The wind is stuck cross-onshore from the NW or NNW, blowing 9 to 15 mph. The swell tries to build again – by Monday the 10th we’re seeing 7 ft of NW at 9 seconds, and combined energy hits 964 (moderate to strong) – but it’s all chopped up and messy. On Tuesday the 11th, the swell peaks at 8 ft with a huge energy reading of 1588 (strong), but again, the wind’s trash. That’s expert-only territory if you’re brave, but honestly, it looks more like a kitesurfing day than a paddle session.

Wednesday the 12th through Friday the 14th morning is still mostly marginal, with cross-onshore winds and chest-high NW swell in the 5 ft to 6 ft range. The energy stays moderate to strong.

Then, finally, the light at the end of the tunnel. Friday afternoon, August 14th, the wind goes glassy again. You’ve got 5 ft of NW swell, period stretching to 10 seconds, and a combined energy of 821 (moderate). The forecast calls for very good conditions. That’s a standout.

And Saturday, August 15th afternoon, is another beauty. The swell drops a bit to 3 ft, but it’s long-period SSW groundswell at 16 seconds, with a huge energy reading of 922 (strong). The wind is glassy from the NW at just 3 mph. Those long-period swells love a reef setup like Third Reef, and this one should produce some proper shaped waves, though the sets will be more spaced out.

Sunday the 16th afternoon keeps the run going – glassy, calm wind, 3 ft of SSW groundswell, period 16 seconds, and combined energy 781 (moderate). Another very good call. After that, Monday and Tuesday the 17th and 18th fade back to small and marginal, and Wednesday the 19th brings another pulse of short-period NW windswell with poor winds.

So, in short: Tuesday afternoon, August 4th, is your early call, and Friday afternoon the 14th through Sunday the 16th is the best run of clean, long-period surf in the second week. That’s what you wait for.

Rusty

Short Range Forecast

Mostly dry. Very mild (max 18°C on Tue morning, min 13°C on Tue night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Warm (max 26°C on Sat afternoon, min 12°C on Sun night). Wind will be generally light.

Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
Sunday
9
Monday
10
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
2
2
2
1
1
2
0
0
2
0
2
2
0
0
0
0
0
1
0
0
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1.5
NW
9
1.3
NW
8
1.1
NW
8
1
NW
8
0.9
NW
8
0.5
SW
14
0.5
SW
13
0.5
SW
13
0.6
SSW
13
1.1
NW
7
0.4
SSW
18
1.6
NW
7
0.6
SSW
17
1.8
NW
7
1.3
NW
8
1.7
NW
8
2.1
NW
8
1.6
NW
9
1.8
NW
9
2.2
NW
9
1.8
NW
9
Wave Graph
Metric surfscale
Energy kJ
343
256
149
129
107
95
87
85
113
132
133
241
235
336
216
398
596
384
475
703
497
Wind (km/h)
10
SSE
5
WSW
0
WSW
10
S
10
S
0
NE
10
W
10
WNW
5
N
10
WNW
5
WNW
10
N
15
NW
25
NNW
15
N
20
NW
25
NNW
15
N
20
NW
25
NW
15
N
Wind State
cross-off
glassy
glassy
cross
cross
glassy
on
cross-on
glassy
cross-on
glassy
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
High Tide
3:54PM1.81m
4:39AM1.25m
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
Low Tide
9:20AM0.47m
10:44PM0.37m
9:57AM0.64m
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
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
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
6:18
6:18
6:18
6:20
6:20
6:22
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:27
8:24
8:23
8:22
8:22
8:21
8:19
 mm
Temp °C
18
16
15
14
16
15
14
15
15
17
16
16
18
26
24
20
25
20
18
21
19
Feels °C
17
15
15
13
15
15
13
14
14
16
15
15
16
22
20
16
20
16
15
17
15
  • Map Icons:
  • Break
  • 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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