Third Reef Surf Break

Lat Long: 40.03° N 124.08° W

Third Reef Surf Forecast and Surf Report

Issued: 10 pm 19 Jul 2026 (local time)

Forecast update in  hr  min

Today's Third Reef sea temperature is
13.2° C
0.0° 

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 20 Jul 2026:

  • Best quality surf: Monday 20 Jul, 5AM (local time) - 2.5ft (0.8m), 16s period, SW swell with glassy winds.
  • Most powerful swell: Sunday 26 Jul, 8AM (local time) - 4ft (1.2m), 20s period, SW swell with 1,111 kJ wave energy.
  • Next surfable swell (1★+): Monday 20 Jul, 5AM (local time) - 2.5ft (0.8m), 16s 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 Monday (Jul 20) at 5AM. The primary swell is predicted to be 0.8m and 16s period with a secondary swell of 1.1m and 8s. 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 1.2m 20s and forecast to arrive on Sunday (Jul 26) at 8AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 13s period and expected on Saturday (Jul 25) at 2PM.

Wave TypeTime (PDT) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Mon 20th Jul)2.5ft (0.8m) 16s
Best Surf 5AM (Mon 20th Jul)2.5ft (0.8m) 16s
Most Powerful 8AM (Sun 26th Jul)4ft (1.2m) 20s

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


The Lowdown

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

Well, it’s a bit of a quiet start, but there’s a real gem waiting for us down the line if we can hold out. The first week or so is mostly marginal, with some small, long-period groundswell arriving but not really lining up with the winds. The real standout in this whole 16-day window is happening way later, on the 3rd of August.

We kick off on Monday, 20th July, with a small 2ft swell from the southwest, with a very long 16-second period. The combined energy is moderate at 526, but the wind is onshore or cross-onshore, and the surf is just marginal. Not worth getting excited about. Tuesday, 21st July, sees a bit of a drop in energy, but Tuesday afternoon turns glassy with 2ft SW swell – that’s a nice clean window for a few quiet ones. Wednesday, 22nd, and Thursday, 23rd, continue the same pattern: small SW swell, glassy windows in the afternoons, but the energy is fickle and the forecasts are all for marginal surf.

Friday, 24th July, the period jumps up to 24 seconds, which is incredibly long, and the energy picks up to 595 (moderate) in the morning, but it’s cross-onshore. The afternoon sees a big jump in energy to 1063, but again, cross-onshore wind – it’s going to be lumpy and messy. Not clean.

Then we hit a rough patch. From Saturday, 25th July, all the way through to the end of the month, the wind is a real problem. It’s mostly cross-onshore from the NW or NNW, blowing 12 to 19 mph. The swell is there, but it’s poor quality, with the energy still in the 900-1300 range (strong to very strong). The wave comment is “poor surf conditions” almost constantly. This is a stretch where the setup looks more interesting for kite surfing than paddle surfing.

We finally get a break on the 2nd of August. Sunday afternoon sees a 7ft NW swell, still cross-onshore and marginal, but the size is starting to get up there.

Now, here’s the one you’ve been waiting for. Monday, 3rd August, is the standout. The morning starts with a 7ft NW swell, a 9-second period, and glassy conditions. The combined energy is 796 (strong). The wave comment says “expect very good surf conditions.” That’s the real deal. By Monday afternoon, it gets even better: 8ft NW swell, still glassy, with energy climbing to 1080 (very strong). The wave comment is “excellent surf conditions for experienced surfers.” That’s a big call. The optimum swell direction for Third Reef is WNW, and this is coming from NW – close enough to be very good, and with glassy winds, it’s going to be clean and powerful. The water temp is about average for the time of year. This is a wave for the crew who know what they’re doing, as 8ft is getting into expert territory. The 9-second period is on the shorter side, so it won’t be as drawn out as a longer period swell, but it should still offer some punchy, fun waves.

Tuesday, 4th August, the morning drops off a bit with a light cross-shore wind, still 7ft but the quality fades to marginal.

So, to sum it up: the first week is a write-off unless you’re desperate for a small glassy session in the afternoons. The 3rd of August is the absolute highlight. If you can wait, that Monday is going to fire. Don’t get sucked into the windy, choppy junk before it.

Rusty, signing off.

Short Range Forecast

Mostly dry. Very mild (max 18°C on Tue night, min 12°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

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

Monday
20
Tuesday
21
Wednesday
22
Thursday
23
Friday
24
Saturday
25
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
3
2
2
1
1
2
2
1
2
2
1
1
2
1
3
3
0
2
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
17
0.7
SW
16
0.9
SW
16
0.9
SW
16
0.8
SSW
16
0.7
SW
14
0.9
SSW
14
0.7
SSW
15
0.8
SSW
15
0.8
SSW
14
0.8
SSW
14
0.8
SSW
14
0.7
SSW
14
0.6
SSW
24
0.9
SW
24
0.7
SW
23
1.1
SW
21
1
SW
21
1.1
SW
20
Wave Graph
Metric surfscale
Energy kJ
419
261
362
367
310
203
321
193
270
220
233
233
173
374
801
554
1051
898
872
Wind (km/h)
0
NE
5
W
10
NW
5
NNW
5
WNW
5
WNW
0
NE
5
W
5
WNW
0
NE
5
W
5
WNW
5
NNE
15
WNW
10
NW
15
NNE
20
NW
15
NW
15
NNE
Wind State
glassy
on
cross-on
cross-on
on
glassy
glassy
on
glassy
glassy
on
on
glassy
cross-on
cross-on
cross-off
cross-on
cross-on
cross-off
High Tide
4:22AM1.36m
5:02PM1.77m
5:40AM1.19m
5:44PM1.78m
7:13AM1.10m
6:30PM1.78m
8:45AM1.11m
7:18PM1.80m
9:56AM1.17m
8:07PM1.82m
10:48AM1.23m
8:54PM1.86m
Low Tide
10:44PM0.51m
10:22AM0.40m
11:52PM0.42m
11:03AM0.61m
00:59AM0.33m
11:47AM0.78m
2:02AM0.23m
12:38PM0.91m
2:59AM0.13m
1:37PM0.99m
3:49AM0.03m
2:38PM1.02m
4:32AM-0.05m
cloud
cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
clear
part cloud
part cloud
clear
part cloud
part cloud
clear
clear
clear
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:03
6:03
6:05
6:05
6:07
6:07
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
8:40
8:40
8:39
8:38
8:37
8:37
8:37
 mm
Temp °C
13
14
14
16
16
16
18
18
16
16
16
16
15
16
16
17
17
17
19
Feels °C
13
14
14
16
15
14
18
17
15
16
16
16
16
16
15
16
13
14
17
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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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