Third Reef Surf Break

Lat Long: 40.03° N 124.08° W

Third Reef Surf Forecast and Surf Report

Issued: 10 pm 15 Aug 2026 (local time)

Forecast update in  hr  min

Today's Third Reef sea temperature is
13.4° C
0.8° 

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 16 Aug 2026:

  • Best quality surf: Saturday 22 Aug, 11PM (local time) - 7ft (2.2m), 8s period, NW swell with cross-offshore winds.
  • Most powerful swell: Sunday 23 Aug, 2AM (local time) - 7ft (2.1m), 9s period, NW swell with 671 kJ wave energy.
  • Next surfable swell (1★+): Sunday 16 Aug, 5AM (local time) - 3.5ft (1.1m), 16s period with SSW 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 Sunday (Aug 16) at 5AM. The primary swell is predicted to be 1.1m and 16s period with a secondary swell of 0.4m and 10s. Another secondary swell of 0.7m and 5s is also forecast. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Third Reef in the next 16 days are 2.1m 9s and forecast to arrive on Sunday (Aug 23) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 15s period and expected on Sunday (Aug 23) at 2AM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Sun 16th Aug)3.5ft (1.1m) 16s
Best Surf11PM (Sat 22nd Aug)7ft (2.2m) 8s
Most Powerful 2AM (Sun 23rd Aug)7ft (2.1m) 9s

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


The Lowdown

Alright folks, Rusty here. Let's break down what's on the menu for Third Reef over the next couple of weeks.

We're looking at a pretty quiet stretch ahead. The surf is small for most of the run, and the conditions are a bit of a mixed bag. The good news is that we have a couple of standouts, but you'll need to pick your moments. The water temp is about what you'd expect for this time of year, nothing out of the ordinary.

The real highlight falls on Sunday afternoon, the 16th of August. That afternoon, the wind goes glassy, with a slight 3 km/h breeze from the NNW. The swell is a modest 3ft out of the SSW, but it's packing a long 16-second period, which gives it some real energy (579). It's going to be glassy, clean, and the best chance we've got for a proper session. That's the one to circle.

The next best option comes a week later, on Sunday afternoon, the 23rd of August. The wind is forecast to be dead calm, glassy, with a 5ft NW swell. The period is a bit shorter at 9 seconds, but the energy is solid (529). If you can wait, that's a promising window, though it's further out so keep an eye on it.

For the rest of the period, things are small. Monday the 17th has a tiny 3ft SSW swell with glassy morning conditions, so it's worth a look for a grovel, but it's marginal. From Tuesday the 18th through to the 22nd, it's mostly choppy, cross-on shore wind and small, weak surf. The last week of August and into the start of September looks consistently poor with small SSW swells and persistent cross-on breezes, nothing to get excited about.

The 27th of August afternoon sees a jump in size to 7ft, but from the NW with a short 8-second period and cross-on wind, making it a messy, choppy prospect. That's a kite-surfing setup more than a clean paddle session.

So, bottom line: snag that Sunday afternoon glass-off on the 16th, and keep an eye on the 23rd. Otherwise, it's a quiet time at Third Reef.

Rusty, signing off.

Short Range Forecast

Mostly dry. Very mild (max 16°C on Sun morning, min 12°C on Mon night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Very mild (max 17°C on Tue night, min 12°C on Wed night). Wind will be generally light.

Sunday
16
Monday
17
Tuesday
18
Wednesday
19
Thursday
20
Friday
21
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
3
2
2
1
1
0
1
2
1
2
3
0
1
2
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
1
SSW
16
1.1
SSW
16
1
SSW
16
0.9
SSW
15
0.9
SSW
14
0.9
SSW
15
0.9
SSW
15
0.7
SSW
14
0.8
SSW
15
0.8
SSW
16
0.8
SSW
15
0.9
SSW
15
0.9
SSW
15
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.9
WNW
11
0.4
SW
18
0.5
SSW
13
Wave Graph
Metric surfscale
Energy kJ
539
620
512
334
330
334
334
178
252
291
270
305
314
236
226
242
176
112
99
Wind (km/h)
5
NNE
10
WNW
5
NNW
5
N
5
W
10
WNW
10
N
15
WNW
10
NW
10
N
10
NW
10
NW
10
NNE
15
WNW
15
WNW
10
NNW
15
WNW
15
NW
15
NNE
Wind State
cross-off
cross-on
glassy
cross
glassy
on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross-off
cross-on
cross-on
cross-on
cross-on
cross-on
cross-off
High Tide
2:11AM1.71m
2:47PM1.83m
3:06AM1.52m
3:22PM1.81m
4:06AM1.35m
3:58PM1.78m
5:19AM1.21m
4:39PM1.74m
6:54AM1.14m
5:29PM1.71m
8:32AM1.16m
6:29PM1.70m
Low Tide
8:12PM0.41m
8:22AM0.24m
9:06PM0.37m
8:57AM0.45m
10:03PM0.35m
9:32AM0.66m
11:05PM0.34m
10:11AM0.83m
00:11AM0.32m
10:57AM0.96m
1:18AM0.28m
11:59AM1.05m
2:21AM0.22m
clear
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part cloud
clear
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part cloud
clear
part cloud
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clear
part cloud
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clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:28
6:28
6:30
6:31
6:31
6:33
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:13
8:12
8:09
8:08
8:07
8:06
8:05
 mm
Temp °C
14
16
16
16
15
16
13
15
16
17
16
16
14
16
15
14
15
16
18
Feels °C
14
15
15
16
15
15
13
13
15
15
14
13
14
14
13
14
13
14
17
  • Map Icons:
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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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