Third Reef Surf Break

Lat Long: 40.03° N 124.08° W

Third Reef Surf Forecast and Surf Report

Issued: 10 am 02 Sep 2026 (local time)

Forecast update in  hr  min

Today's Third Reef sea temperature is
13.6°C
0.9° 

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 2 Sep 2026:

  • Best quality surf: Thursday 3 Sep, 11PM (local time) - 5.5ft (1.7m), 11s period, WNW swell with cross-offshore winds.
  • Most powerful swell: Friday 4 Sep, 2PM (local time) - 3.5ft (1.1m), 18s period, SSW swell with 759 kJ wave energy.
  • Next surfable swell (1★+): Thursday 3 Sep, 5AM (local time) - 2.5ft (0.7m), 17s 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 (Sep 03) at 5AM. The primary swell is predicted to be 0.7m and 17s period with a secondary swell of 1.3m and 9s. Another secondary swell of 1.0m 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 1.1m 18s and forecast to arrive on Friday (Sep 04) at 2PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 12s period and expected on Tuesday (Sep 08) at 8PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Thu 3rd Sep)2.5ft (0.7m) 17s
Best Surf11PM (Thu 3rd Sep)5.5ft (1.7m) 11s
Most Powerful 2PM (Fri 4th Sep)3.5ft (1.1m) 18s

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


The Lowdown

Alright folks, Rusty here. Let’s talk about the next couple of weeks at Third Reef.

We’re kicking off a pretty slow run, to be honest. The first week is a bit of a grind with weak, onshore-affected swell and a lot of marginal conditions. The real standout isn’t until the second week, so we’ve got some patience to practice.

Things start off on Wednesday, September 2nd with a small 2ft groundswell from the SW. The period is very long at 18 seconds, but with a cross-off wind and a combined energy of 438 (moderate), it’s just a bit messy. The water temp is sitting at 57°, which is about 2° cooler than average for this time of year, so not a huge anomaly, but a touch nippy.

Thursday the 3rd morning shows a little more push with a 3ft SW groundswell (19 sec period) and a light cross wind, the energy jumps to 1005 (strong). It’s still a bit questionable though. The real size shows up Thursday afternoon with a 6ft WNW swell, but the period is short at 10 seconds, and the wind is onshore. That’s 840 (strong) energy, but the wind is going to ruin it.

Friday morning the 4th has a 3ft SSW groundswell (18 sec) with a cross-on breeze. Energy is strong at 1147 (strong), but we’re still fighting that wind direction. That pattern of light cross-on winds and marginal surf drags on through the weekend and into the start of the next week. There’s a bit of a lull here with a few days of poor surf conditions, so don’t get your hopes up for the first Saturday or Sunday.

The real standout is Monday, September 14th. We finally get a glassy morning with a 3ft NW swell (12 seconds) and a combined energy of 411 (moderate). The wind is dead calm, glassy. That’s the window. Then Monday afternoon, the swell bumps up to 5ft from the NW, still glassy, and the energy rockets to 914 (strong). This is the best on offer. The swell direction (NW) is a perfect match for the optimum WNW direction for this reef. That afternoon session is the one to circle.

Tuesday, September 15th is also a solid shout. A 7ft NW swell rolls in with glassy conditions in the afternoon. The period is a bit short at 8 seconds, but the energy is 635 (strong) and the conditions will be clean. This is great for intermediate to advanced surfers, but 7ft is getting a bit big for beginners.

The tail end of the forecast, around Wednesday the 16th and Thursday the 17th, keeps a similar 5ft to 7ft NW swell going, but the wind is a light cross-on or onshore, so it won’t be as clean as Monday or Tuesday. Still, the energy is there (up to 932 on Thursday afternoon), so it could be worth a look if you’re desperate.

Keep in mind, this is a reef break, so those long period SW swells (like 18-19 seconds) we saw early on are better suited here than at a beach break. The long waits between sets will make paddling out easier, but the wave shape will be solid.

Rusty.

Short Range Forecast

Heavy rain (total 28mm), heaviest during Wed night. Very mild (max 16°C on Thu morning, min 12°C on Thu night). Wind will be generally light.

Days 4-6 Weather Summary

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

Wednesday
2
Thursday
3
Friday
4
Saturday
5
Sunday
6
Monday
7
Tuesday
8
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
0
2
3
2
4
3
3
3
2
0
3
2
0
2
0
0
2
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)
0.6
SW
18
0.9
WNW
8
1.4
WNW
8
0.9
SW
19
1.7
WNW
10
1.7
NW
11
1
SSW
18
1
SSW
17
1.1
SSW
16
1.1
SSW
16
1
SSW
16
1.1
SSW
15
1
SSW
15
0.9
SSW
15
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
13
0.7
SSW
13
1.3
NW
7
1.4
NW
7
Wave Graph
Metric surfscale
Energy kJ
252
101
245
513
592
702
651
629
659
582
463
525
411
334
264
233
223
156
158
164
183
Wind (km/h)
20
SSE
25
SE
15
SSE
10
S
10
W
10
NE
10
SW
10
WNW
10
NE
10
WNW
20
WNW
5
NE
10
W
20
WNW
10
NNE
10
WNW
15
NW
10
NNE
10
NW
15
NW
5
NNW
Wind State
cross-off
cross-off
cross-off
cross
on
cross-off
cross-on
on
cross-off
on
cross-on
cross-off
on
cross-on
cross-off
cross-on
cross-on
cross-off
cross-on
cross-on
glassy
High Tide
3:05PM1.92m
4:47AM1.26m
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
Low Tide
8:43AM0.71m
10:19PM0.12m
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
cloud
light rain
heavy rain
rain showers
rain showers
clear
clear
clear
clear
clear
clear
clear
part cloud
part cloud
clear
clear
part cloud
part cloud
cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:43
6:45
6:46
6:47
6:48
6:48
6:50
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:45
7:45
7:43
7:40
7:39
7:37
7:37
 mm
4
21
2
1
Temp °C
15
15
15
16
16
15
15
15
15
16
16
15
15
15
14
16
16
17
16
16
14
Feels °C
12
12
12
16
16
14
13
14
14
14
13
15
13
13
14
14
14
16
14
14
14
  • 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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