Surf Forecasts:
Number Threes surf forecast from 8 Sep 2026:
- Best quality surf: Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period, SSW swell with glassy winds.
- Most powerful swell: Tuesday 8 Sep, 2AM (local time) - 18ft (5.5m), 14s period, SSW swell with 11,453 kJ wave energy.
- Next surfable swell (1★+): Wednesday 9 Sep, 5AM (local time) - 3ft (0.9m), 14s period with SSW 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 Wednesday (Sep 09) at 5AM. The primary swell is predicted to be 0.9m and 14s period with a secondary swell of 1.2m and 10s. Another secondary swell of 0.9m and 8s is also forecast. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Number Threes in the next 16 days are 5.5m 14s and forecast to arrive on Tuesday (Sep 08) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 9s period and expected on Tuesday (Sep 08) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Best Surf | 5AM (Wed 9th Sep) | 3ft (0.9m) 14s |
| Most Powerful | 2AM (Tue 8th Sep) | 18ft (5.5m) 14s |
Table - best surf conditions forecast for Number Threes over the next 16 days.
The Lowdown
Alright, here's the deal. The first few days at Number Threes are rank. Monday the 7th is a lost cause with 40 km/h cross-onshore winds slapping a 7ft mess around – all that energy, 3,247 units, but it's just whitewash and wind. Tuesday the 8th isn’t much better: 2.4m of lumpy, cross-onshore slop.
Things start to clean up on Wednesday the 9th. Swell drops to 3ft, but the wind goes light and cross-off in the afternoon. The water turns clean. At a consistent, exposed reef like Number Threes with no crowds mentioned, you could have this one to yourself. Wave energy is a modest 540, and with a 13-second period from the SSW, you get some push and longer waits. That's your first real chance for a wave.
Hold out for the 16th and 17th of September, though. That’s the real highlight. Wednesday the 16th afternoon shows a risk of thunderstorms, but wind is light and cross-off – dead glass. Swell is 3ft from the SSW with a gnarly 18-second period. That's deep ocean groundswell. Combined energy of 598 isn't huge, but that period will make the reef reel. Thursday the 17th afternoon is a carbon copy: light cross-off, 3ft SSW swell at 16 seconds, and clean conditions. For a surfer who knows how to read a set, this is gold.
Friday the 18th afternoon sees a slight bump to 4ft SSW swell at 17 seconds and a light cross-off. Combined energy hits 787, the best we see after the early blowout. After that, the second week slides into small stuff, 2ft to 3ft, with only minor spikes. But the very last day, Tuesday the 22nd, gives you a morning of absolute glass – zero wind – and a 2ft SSW 14-second swell. That’s a prayer answered for the patient soul.
Water temp sits at 27°, perfectly normal for the season.
So, two windows stand out: Wednesday the 9th afternoon as a gentle return, and the 16th through 18th for the cleanest, longest-period waves on offer. Get after it.
Rusty.
Short Range ForecastModerate rain (total 15mm), heaviest on Mon night. Warm (max 28°C on Tue afternoon, min 26°C on Tue night). Winds decreasing (near gales from the SSE on Mon night, calm by Wed morning). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Fri morning, min 24°C on Thu night). Wind will be generally light. | ||||||||||||||||||
Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | Sunday 13 | ||||||||||||||
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) | SSW 14 | SSW 10 | ENE 11 | ENE 10 | SSW 14 | SSW 13 | ENE 7 | ENE 7 | ENE 7 | SW 16 | ENE 11 | ENE 11 | ENE 10 | SW 15 | ENE 10 | ENE 9 | SW 15 | SW 15 | ENE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 11453 | 1066 | 650 | 378 | 269 | 257 | 176 | 231 | 203 | 268 | 325 | 245 | 245 | 242 | 157 | 146 | 107 | 54 | 76 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | cross | 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 |
High Tide | 2:09AM0.32m | 2:28PM0.72m | 2:51AM0.39m | 3:05PM0.69m | 3:32AM0.45m | 3:39PM0.64m | 4:11AM0.50m | 4:12PM0.57m | 4:51AM0.54m | 4:42PM0.50m | 5:31AM0.57m | 5:11PM0.43m | |||||||
Low Tide | 8:57PM0.08m | 7:26AM0.06m | 9:22PM0.06m | 8:21AM0.06m | 9:46PM0.05m | 9:12AM0.07m | 10:10PM0.04m | 10:02AM0.10m | 10:33PM0.04m | 10:52AM0.13m | 10:56PM0.05m | 11:45AM0.17m | 11:19PM0.06m | ||||||
 |  |  |  | |  |  | | | | | |  | | | | | | | |
 | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — | 6:16 | — | — |
 | 6:42 | — | 6:40 | — | — | 6:39 | — | — | 6:38 | — | — | 6:37 | — | — | 6:37 | — | — | 6:36 | — |
mm | 11 | 1 | — | — | — | — | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 28 | 27 | 27 | 27 | 27 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 |
Feels °C | 23 | 26 | 29 | 31 | 31 | 30 | 31 | 26 | 25 | 25 | 26 | 26 | 25 | 26 | 25 | 25 | 25 | 25 | 27 |
Swell 1 Height (m) Direction Period (s) | ENE 12 | WSW 10 | SSW 8 | ENE 10 | ENE 9 | ENE 8 | ENE 7 | E 12 | ENE 7 | SW 16 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 10 | ENE 9 | NE 8 | NE 8 | NE 8 |
| kJ | 1102 | 640 | 488 | 378 | 165 | 105 | 172 | 141 | 203 | 268 | 325 | 245 | 245 | 160 | 157 | 146 | 72 | 72 | 57 |
Swell 2 Height (m) Direction Period (s) | ENE 12 | ENE 11 | ENE 11 | SSW 8 | SSW 14 | SSW 13 | E 13 | SSW 13 | E 12 | E 11 | SW 16 | SW 15 | SW 15 | SW 15 | NE 9 | NE 9 | E 5 | SW 15 | SW 13 |
| kJ | 1302 | 785 | 650 | 137 | 269 | 257 | 156 | 133 | 101 | 125 | 261 | 229 | 226 | 242 | 75 | 75 | 27 | 54 | 40 |
Swell 3 Height (m) Direction Period (s) | SSW 15 | SSW 15 | W 8 | SSW 14 | SSW 8 | E 13 | SSW 13 | SSW 16 | SSW 13 | S 12 | SSW 12 | NNE 8 | SSW 11 | NNE 8 | SW 16 | SW 13 | SW 15 | ENE 9 | SSW 15 |
| kJ | 581 | 474 | 136 | 356 | 72 | 166 | 176 | 181 | 129 | 71 | 45 | 32 | 24 | 45 | 124 | 85 | 107 | 26 | 21 |
Wind waves Height (m) Direction Period (s) | SSW 14 | SSW 10 | — | — | — | — | W 4 | ENE 7 | — | ENE 7 | — | — | — | — | — | ENE 5 | ENE 5 | ENE 5 | ENE 8 |
| kJ | 11453 | 1066 | — | — | — | — | 2 | 231 | — | 151 | — | — | — | — | — | 36 | 15 | 20 | 76 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 147 | 142 | 15 | 7 | 1 | 1 | 0 | 31 | 1 | 1 | 1 | 1 | 31 | 31 | 1 | 29 | 31 | 1 | 0 |
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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