Third Reef Surf Break

Lat Long: 40.03° N 124.08° W

Third Reef Surf Forecast and Surf Report

Issued: 10 am 03 Sep 2026 (local time)

Forecast update in  hr  min

Today's Third Reef sea temperature is
13.7°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 4 Sep 2026:

  • Best quality surf: Thursday 3 Sep, 11PM (local time) - 5.5ft (1.7m), 11s period, WNW swell with glassy winds.
  • Most powerful swell: Saturday 5 Sep, 11PM (local time) - 4.5ft (1.3m), 15s period, SSW swell with 776 kJ wave energy.
  • Next surfable swell (1★+): Thursday 3 Sep, 8PM (local time) - 5ft (1.6m), 11s period with WNW 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 (Sep 03) at 8PM. The primary swell is predicted to be 1.6m and 11s period. 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 1.3m 15s and forecast to arrive on Saturday (Sep 05) at 11PM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 13s period and expected on Tuesday (Sep 08) at 8PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 8PM (Thu 3rd Sep)5ft (1.6m) 11s
Best Surf11PM (Thu 3rd Sep)5.5ft (1.7m) 11s
Most Powerful11PM (Sat 5th Sep)4.5ft (1.3m) 15s

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


The Lowdown

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

We’re looking at a real mixed bag over the next couple of weeks. The main show is a reef break that needs a specific swell direction to really work, and it’s going to take a while for things to line up. There’s a decent stretch of small, messy surf early on, but the real standout is a big pulse that shows up in the second week. It’s a waiting game.

First real chance to get wet is this Thursday afternoon, the 3rd of September. Third Reef is showing a 6ft swell out of the WNW with a period of 10 seconds. The wind is dead flat, glassy conditions. The water temp is sitting at 57°, which is about 1° cooler than normal for this time of year, so not a major anomaly. This is a solid window for a session, but the energy is moderate (1026). This is your best bet for the early going.

Friday morning the 4th sees a drop-off in size, down to 3ft, with a longer period of 18 seconds from the SSW. The wind is light and cross, so it’s not clean. The afternoon’s a bit better with offshore wind, but the swell is still small. The energy is strong (1255 and 1079), but the conditions are only marginal.

From Saturday the 5th through to Wednesday the 9th, we’re in a dry spell. The swell drops to under 3ft, the wind turns onshore or cross-onshore, and the energy fades from moderate (947) down to weak (157). The surf is poor to marginal. Not worth the paddle.

There’s a slight lift on Thursday the 10th, with a 3ft SSW swell and a 17-second period, but the wind is still cross-onshore. The energy is moderate (484-562). It’s only a marginal call.

Now, for the big one. Friday the 11th of September, a major pulse arrives. Third Reef gets a 10ft swell from the SSW, with a period of 13 seconds. The combined energy is massive, hitting 2699. That’s a lot of water moving. The wind is light and offshore in the morning. This is big, powerful stuff. At 10ft, this is for experienced surfers only. The period is short enough that it should still have some shape, but it’s a serious, powerful wave. This is the standout for the whole outlook, but it’s a long-range call, so keep an eye on it.

After that, Saturday the 12th and Sunday the 13th are blown out by strong cross-onshore winds, with the swell dropping back to 6ft to 6ft. Not good.

Monday the 14th of September afternoon is a little glass-off with a 4ft NW swell and a 9-second period. The energy is weak (354). It’s a small, clean wave, but nothing special.

Tuesday the 15th afternoon is another glassy window with a tiny 3ft NW swell. Good for a longboard, but not much else.

The real hope for the far end of the forecast is Thursday the 18th of September. The morning is glassy, with a 2ft SW swell, a very long 21-second period, and an energy of 663. The afternoon is also glassy, with the swell bumping up to 3ft and the energy jumping to 1121. The very long period means this is a groundswell, and it will be best at Third Reef, a reef setup. The waves will be clean, well-shaped, and have a lot of energy for their size. This is another promising, long-range standout.

For the rest of the period, the 15th, 16th, and 17th have small, glassy windows but the swell is tiny. It’s a long wait between the big Friday the 11th and the Thursday the 18th.

Rusty out.

Short Range Forecast

Light rain (total 3mm), mostly falling on Thu morning. Very mild (max 16°C on Thu morning, min 12°C on Fri night). Wind will be generally light.

Days 4-6 Weather Summary

Mostly dry. Very mild (max 16°C on Sun afternoon, min 11°C on Sun night). Wind will be generally light.

Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
Wednesday
9
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
4
4
3
3
3
2
1
3
2
0
2
0
0
2
1
0
2
0
1
2
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
SW
19
1.7
WNW
10
1.6
NW
11
1
SSW
18
1
SSW
17
1.1
SSW
16
1.1
SSW
16
1.1
SSW
16
1.1
SSW
15
1
SSW
15
1.1
SSW
14
0.8
SSW
14
0.8
SSW
14
0.9
SSW
14
0.7
SSW
13
0.6
SSW
13
1.3
NW
7
0.5
SW
18
0.5
SW
16
0.6
SSW
16
0.7
SW
18
Wave Graph
Metric surfscale
Energy kJ
513
592
582
651
629
659
620
589
512
405
478
264
233
289
156
121
160
161
130
179
312
Wind (km/h)
5
SSW
5
SSE
10
NE
5
SW
10
W
10
NE
10
W
15
WNW
5
NE
10
W
25
WNW
10
NNE
10
WNW
15
NW
10
NNE
10
WNW
15
NW
5
NNE
5
SW
10
WNW
5
ENE
Wind State
cross-on
glassy
cross-off
cross-on
on
cross-off
on
on
cross-off
on
cross-on
cross-off
on
cross-on
cross-off
on
cross-on
glassy
cross-on
on
off
High Tide
3:51PM1.93m
6:22AM1.19m
4:51PM1.92m
8:01AM1.23m
6:05PM1.91m
9:09AM1.32m
7:25PM1.94m
9:55AM1.43m
8:38PM1.98m
10:34AM1.54m
9:41PM2.01m
11:10AM1.66m
10:38PM2.00m
Low Tide
9:24AM0.86m
11:29PM0.07m
10:20AM0.98m
00:44AM0.02m
11:41AM1.05m
1:56AM-0.06m
1:13PM1.04m
3:00AM-0.12m
2:35PM0.93m
3:53AM-0.16m
3:43PM0.76m
4:40AM-0.15m
4:40PM0.58m
light rain
light rain
clear
clear
clear
clear
clear
clear
clear
cloud
part cloud
clear
clear
clear
part cloud
part cloud
cloud
part cloud
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:45
6:46
6:47
6:48
6:48
6:50
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:45
7:43
7:40
7:39
7:37
7:37
7:35
 mm
2
1
Temp °C
16
15
15
15
16
15
16
15
14
15
16
16
16
16
15
16
15
13
14
14
14
Feels °C
15
15
15
14
15
15
15
13
14
13
12
14
14
14
14
15
13
13
13
13
13
  • 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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