Surf Forecasts:
Number Threes surf forecast from 2 Sep 2026:
- Best quality surf: Monday 7 Sep, 11AM (local time) - 8ft (2.4m), 13s period, ENE swell with cross-offshore winds.
- Most powerful swell: Tuesday 8 Sep, 11AM (local time) - 10ft (3.0m), 14s period, SW swell with 3,067 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 5AM (local time) - 8ft (2.4m), 13s period with ENE swell.
Best Forecast Surf Conditions for Number Threes this week:
The surf forecast for Number Threes over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 5AM. The primary swell is predicted to be 2.4m and 13s period with a secondary swell of 1.3m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Number Threes in the next 16 days are 3.0m 14s and forecast to arrive on Tuesday (Sep 08) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 11s period and expected on Saturday (Sep 05) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Mon 7th Sep) | 8ft (2.4m) 13s |
| Best Surf | 11AM (Mon 7th Sep) | 8ft (2.4m) 13s |
| Most Powerful | 11AM (Tue 8th Sep) | 10ft (3.0m) 14s |
Table - best surf conditions forecast for Number Threes over the next 16 days.
The Lowdown
Alright, let's get into it.
The next couple of weeks are going to be a bit of a waiting game for us. We've got plenty of swell, but the quality is going to be the issue. The first few days are looking average at best, with strong cross-off winds making things a bit lumpy and uncertain. To be honest, the first half of this stretch is pretty much a write-off for a proper session. We're looking at a solid gap with no real recommendations until things start to clean up.
The big change arrives on September 8th (Tuesday). That’s when the magic starts to happen. The swell swings around to the WSW and bumps up to a solid 8ft, and the energy jumps way up (3514). That’s what we’ve been waiting for. The wind is still cross-off but it’s lighter, and it’s shaping up to be the standout day of this whole period. This is the one to circle on the calendar. Also worth noting that we’ve got a proper long-period groundswell developing on the 5th and 6th, but the conditions on those days are still a bit too messy.
Looking further out, September 13th (Sunday) is another one that looks promising. We see a drop in wind to a light breeze, and the swell is still a solid 7ft from the ENE. The conditions are clean, and the energy is still pumping (1816). It won't be as big as the 8th, but it could be a fun, clean session. The direction isn't perfect, but the quality of the surf should be good for experienced surfers. After that, we see another swell pulse arrive mid-month, but the direction is more SSW and the size drops off, so that’s more of a long-shot.
The real standout here is Number Threes (South East) on the 8th. That’s your pick of the fortnight.
As for the water, it’s running at 81°, which is about normal for this time of year. No drama there.
So, to keep it simple: don't burn your energy this week. Wait for that Tuesday the 8th – that’s the day to be out there.
- Rusty
Short Range ForecastSome drizzle, heaviest during Tue night. Warm (max 26°C on Tue night, min 25°C on Tue night). Mainly strong winds. | Days 5-7 Weather SummaryModerate rain (total 11mm), heaviest on Mon morning. Warm (max 27°C on Sat afternoon, min 23°C on Mon morning). Winds decreasing (strong winds from the ENE on Fri night, light winds from the E by Mon morning). | ||||||||||||||||||
Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | ||||||||||||||
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) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 8 | ENE 8 | ENE 7 | ENE 8 | E 14 | ENE 14 | ENE 13 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 13 | ENE 12 | SW 14 |
Wave Graph  | |||||||||||||||||||
 kJ | 527 | 520 | 502 | 711 | 456 | 717 | 623 | 543 | 553 | 711 | 1846 | 1804 | 1930 | 1610 | 1485 | 1697 | 1787 | 1581 | 2111 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross |
High Tide | 8:21AM0.59m | 6:54PM0.28m | 9:39AM0.62m | 7:57PM0.22m | 10:58AM0.66m | 10:35PM0.19m | 12:05PM0.69m | 00:18AM0.21m | 1:00PM0.73m | 1:21AM0.26m | 1:47PM0.73m | 2:09AM0.32m | |||||||
Low Tide | 00:43AM0.05m | 3:38PM0.25m | 1:25AM0.06m | 6:22PM0.22m | 2:24AM0.08m | 7:30PM0.17m | 3:46AM0.09m | 8:03PM0.13m | 5:11AM0.08m | 8:31PM0.10m | 6:25AM0.07m | 8:57PM0.08m | |||||||
 |  |  |  | | | | | |  | | | | | |  |  |  | | |
 | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:46 | — | 6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — |
mm | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 | 8 | 1 | 4 |
Temp °C | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 23 | 26 | 26 |
Feels °C | 24 | 25 | 23 | 22 | 23 | 22 | 21 | 22 | 22 | 24 | 24 | 25 | 25 | 27 | 26 | 26 | 26 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | S 17 | S 16 | S 16 | S 15 | SE 12 | SSE 13 | S 12 | S 12 | S 11 | E 14 | S 12 | S 12 | SSW 12 | ENE 13 | ENE 12 | ENE 12 | ENE 13 | ENE 12 | SW 14 |
| kJ | 364 | 422 | 318 | 275 | 152 | 361 | 446 | 480 | 363 | 711 | 529 | 650 | 569 | 1610 | 1485 | 1697 | 1787 | 1581 | 2111 |
Swell 2 Height (m) Direction Period (s) | S 10 | SSE 10 | S 11 | E 13 | S 15 | S 14 | E 14 | E 14 | E 14 | S 11 | SSW 17 | SSE 10 | N 11 | SSW 11 | SSW 12 | SSW 11 | SW 14 | SW 14 | ENE 11 |
| kJ | 35 | 20 | 40 | 123 | 209 | 101 | 334 | 357 | 553 | 367 | 117 | 20 | 9 | 353 | 518 | 341 | 1115 | 1363 | 1162 |
Swell 3 Height (m) Direction Period (s) | SW 14 | SW 14 | E 14 | SE 14 | E 13 | SW 13 | SW 18 | SW 18 | SW 13 | N 11 | NNE 10 | NNE 10 | NNE 9 | SW 16 | SSW 19 | SW 14 | SSW 17 | SSW 17 | SSW 15 |
| kJ | 51 | 30 | 66 | 103 | 162 | 7 | 12 | 12 | 26 | 10 | 20 | 19 | 15 | 255 | 271 | 248 | 367 | 516 | 892 |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 8 | ENE 8 | ENE 7 | ENE 8 | ENE 7 | ENE 14 | ENE 13 | ENE 13 | — | — | — | — | — | — |
| kJ | 527 | 520 | 502 | 711 | 456 | 717 | 623 | 543 | 540 | 417 | 1846 | 1804 | 1930 | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 126 | 31 | 40 | 46 | 126 | 128 | 126 | 126 | 128 | 126 | 40 | 31 | 39 | 1 | 1 | 3 | 1 | 1 | 19 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the Number Threes Surf forecast
The above surf forecast table for Number Threes provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Number Threes can be found by selecting the local surf guide option on the grey menu. Our Number Threes 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 (Number Threes) 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 Number Threes 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.
Number Threes is 5 km (3 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.
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