Third Reef Surf Break

Lat Long: 40.03° N 124.08° W

Third Reef Surf Forecast and Surf Report

Issued: 4 pm 07 Aug 2026 (local time)

Forecast update in  hr  min

Today's Third Reef sea temperature is
13.5° C
0.5° 

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 8 Aug 2026:

  • Best quality surf: Tuesday 11 Aug, 5AM (local time) - 8ft (2.4m), 9s period, NW swell with cross-offshore winds.
  • Most powerful swell: Wednesday 12 Aug, 11PM (local time) - 8ft (2.4m), 9s period, NW swell with 1,011 kJ wave energy.
  • Next surfable swell (1★+): Friday 7 Aug, 11PM (local time) - 1.5ft (0.5m), 19s 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 Friday (Aug 07) at 11PM. The primary swell is predicted to be 0.5m and 19s period with a secondary swell of 0.5m and 13s. Another secondary swell of 0.9m and 6s 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 2.4m 9s and forecast to arrive on Wednesday (Aug 12) at 11PM. 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 13s period and expected on Monday (Aug 10) at 11PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+)11PM (Fri 7th Aug)1.5ft (0.5m) 19s
Best Surf 5AM (Tue 11th Aug)8ft (2.4m) 9s
Most Powerful11PM (Wed 12th Aug)8ft (2.4m) 9s

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


The Lowdown

Alright folks, Rusty here. Let’s get into it.

Look, I’m gonna be straight with you – the next 16 days are a bit of a mixed bag at Third Reef. We’re looking at a window that starts clean but small, then gets blown out by a messy westerly swell, before finally tidying up again towards the end. There’s no one single day that’s a total standout, but Friday afternoon offers a real gem if you’re patient.

The first bit of action kicks off Friday afternoon, August 7th. It’s small, with waves around 1 ft from the SSW, but the period is a long 18 seconds, so it’s got some proper groundswell energy to it (292). The wind is glassy from the West, and the water’s sitting at 56°, which is about normal for this time of year. For a Friday arvo session, it’ll be clean and fun on the longboard.

Then we hit a rough patch. From Saturday, August 8th, right through to the end of Monday, August 17th, it’s mostly a no-go. The wind turns cross-onshore and stays that way for days, chopping up a rising swell that pushes over 7 ft at times. This isn’t paddle-surfing weather; with that strong cross-shore wind and those big, short-period NW waves, this setup looks more interesting for kite surfing than paddle surfing. The energy gets intense (hitting over 1500 at one point on Tuesday the 11th), but it’s just not clean.

Things finally start to calm down around Thursday afternoon, August 13th. The swell drops to 5 ft from the NW, with a 9-second period, and the wind goes glassy again. The combined energy is still moderate (594), but it’s the first clean, surfable wave we’ve seen in nearly a week. Conditions are rated as very good, so this is a solid option for a late session.

The run of poor conditions continues, but Wednesday, August 19th, shakes things up. We’ve got a new swell filling in from the WNW and NW, running 4 ft to 5 ft with a longer period of 13 seconds. The energy is strong (over 1100), and the wind is lighter. It’s not perfect, but it’s the best looking mid-range swell. The direction is close to the optimum WNW, so the reef should handle it well.

Finally, the last chance is Saturday afternoon, August 22nd. The swell drops right back to 2 ft from the SSW, with a 14-second period. The wind goes flat calm, glassy. It’s a tiny, clean finish to the outlook. For a calm, quiet end-of-week surf, it’s a nice one.

So, if you’re picking a session, the Thursday afternoon the 13th is the best balance of clean conditions and decent size. For a bit more power, keep an eye on Wednesday the 19th. Crowds are possible at Third Reef, so get in the water early.

Rusty.

Short Range Forecast

Mostly dry. Warm (max 25°C on Sat afternoon, min 13°C on Sat night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 20°C on Mon night, min 12°C on Mon night). Wind will be generally light.

Fri
7
Saturday
8
Sunday
9
Monday
10
Tuesday
11
Wednesday
12
Thursday
13
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
0
0
0
0
0
2
0
0
2
2
1
3
2
2
4
2
3
3
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.4
SSW
18
0.5
SW
16
0.6
SSW
17
1.8
NW
7
1.4
NW
8
1.6
NW
8
2.1
NW
8
1.8
NW
9
1.7
NW
9
2.1
NW
9
1.6
NW
9
2.4
NW
9
2.1
NW
9
1.8
NW
9
2.4
NW
8
1.7
NW
8
2
NW
10
1.7
NW
9
1.6
NW
9
1.3
NW
9
Wave Graph
Metric surfscale
Energy kJ
133
133
237
346
244
375
569
515
447
625
421
910
631
481
830
408
757
499
393
245
Wind (km/h)
5
WNW
10
NNE
15
NW
20
NNW
15
N
25
NW
25
NNW
15
N
20
NW
20
NW
15
N
15
NW
15
NNW
15
N
15
NW
5
WNW
5
ESE
5
S
5
SW
5
SE
Wind State
glassy
cross-off
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross
cross-on
cross-on
cross-off
cross-on
on
glassy
cross
glassy
glassy
High Tide
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
12:25PM1.62m
11:32PM2.16m
1:02PM1.70m
00:26AM2.05m
Low Tide
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
5:48AM-0.37m
5:34PM0.68m
6:30AM-0.30m
6:27PM0.56m
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
cloud
cloud
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:20
6:20
6:22
6:22
6:24
6:24
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:22
8:22
8:21
8:19
8:17
8:16
8:15
 mm
Temp °C
15
16
21
25
23
19
24
20
18
19
20
17
20
20
17
17
16
14
15
14
Feels °C
14
14
18
21
19
15
19
16
15
16
17
15
18
17
15
17
16
14
14
14
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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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