
Surf Forecasts:
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 Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8PM (Thu 3rd Sep) | 5ft (1.6m) 11s |
| Best Surf | 11PM (Thu 3rd Sep) | 5.5ft (1.7m) 11s |
| Most Powerful | 11PM (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 ForecastLight 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 SummaryMostly 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 | |
Swell Height Map | |||||||||||||||||||||
Wave Height (m) Direction Period (s) | SW 19 | WNW 10 | NW 11 | SSW 18 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | NW 7 | SW 18 | SW 16 | SSW 16 | SW 18 |
Wave Graph | |||||||||||||||||||||
513 | 592 | 582 | 651 | 629 | 659 | 620 | 589 | 512 | 405 | 478 | 264 | 233 | 289 | 156 | 121 | 160 | 161 | 130 | 179 | 312 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | ||||||||
6:45 | — | — | 6:46 | — | — | 6:47 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | |
— | 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 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | WNW 10 | NW 11 | NW 11 | NW 10 | WNW 10 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | S 15 | NW 7 | S 13 | S 12 | S 12 | S 13 | S 12 |
492 | 592 | 582 | 505 | 450 | 307 | 620 | 589 | 512 | 405 | 478 | 264 | 233 | 289 | 294 | 121 | 356 | 301 | 374 | 392 | 262 | |
Swell 2 Height (m) Direction Period (s) | SW 19 | SSW 19 | SSW 18 | SSW 18 | SSW 17 | SSW 16 | NW 9 | S 11 | NW 9 | NW 9 | S 15 | SSE 15 | SSE 14 | SSE 13 | NW 8 | S 14 | SSW 13 | NW 7 | NW 7 | NW 7 | SW 18 |
513 | 248 | 559 | 651 | 629 | 659 | 190 | 86 | 118 | 93 | 121 | 292 | 207 | 139 | 67 | 388 | 118 | 67 | 52 | 65 | 312 | |
Swell 3 Height (m) Direction Period (s) | S 13 | SW 15 | S 11 | S 11 | S 12 | S 12 | SSW 12 | SE 14 | SSW 12 | SSW 11 | NW 14 | NW 8 | NW 8 | NW 12 | SSW 13 | SSW 13 | SW 18 | SW 18 | SW 16 | SSW 16 | NW 8 |
123 | 186 | 94 | 121 | 76 | 71 | 137 | 8 | 111 | 68 | 46 | 45 | 54 | 37 | 156 | 118 | 111 | 161 | 130 | 179 | 55 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | NW 9 | — | — | NW 9 | NW 4 | NW 8 | NW 5 | NW 6 | — | NW 7 | — | — | — | — |
— | — | — | — | — | — | — | 190 | — | — | 202 | 4 | 112 | 51 | 72 | — | 160 | — | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 120 | 0 | 0 | 67 | 196 | 0 | 195 | 195 | 0 | 196 | 124 | 0 | 193 | 195 | 0 | 126 | 195 | 0 | 195 | 108 | 0 |
Best forecast wave conditions in Humboldt County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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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.










