
Surf Forecasts:
Number Threes surf forecast from 14 Sep 2026:
- Most powerful swell: Thursday 17 Sep, 2PM (local time) - 7ft (2.1m), 10s period, ENE swell with 811 kJ wave energy.
Best Forecast Surf Conditions for Number Threes this week:
The most powerful waves expected at Number Threes in the next 16 days are 2.1m 10s and forecast to arrive on Thursday (Sep 17) at 2PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.7m 6s period and expected on Wednesday (Sep 16) at 5PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2PM (Thu 17th Sep) | 7ft (2.1m) 10s |
Table - best surf conditions forecast for Number Threes over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what Number Threes has in store over the next couple of weeks. We’ve got a bit of a slow start, so don't rush to wet a line just yet.
The first solid window for a paddle is actually a few days out. Monday the 14th and Tuesday the 15th are pretty weak, with tiny 1ft to 2ft SW swell and short-period junk. The energy is low (135 to 490), and the wind is a moderate cross-off. It’s not really worth suiting up for that. Wednesday the 16th is more of the same, marginal at best with a bump to 3ft but still short-period.
The first real chance at something rideable arrives Thursday the 17th. The swell bumps up to 7ft in the morning from the ENE, but the period is a short 8 seconds. The combined energy is moderate (950), and there’s a solid fresh cross-off breeze. It’s not perfect, but it's the first time the wave face has any push. Thursday afternoon sees the swell drop to 7ft and the energy climbs to 1115 (moderate), still period is short. This is a session for experienced surfers only, because 7ft+ with a short period can be a handful.
Friday the 18th brings a real shift. The morning sees a clean 3ft SSW groundswell with a long 17-second period and moderate energy (1102). The wind is a fresh cross-off, keeping it clean. This is the standout of the first week. That long period means proper shape, longer lulls, and easier paddling out, but it’s going to be fat and straight at a beach break, so it will favour the reef at Number Threes because of the direction. For the advanced crew, this is the pick of the early days.
The weekend from the 19th to the 22nd gets messy. The swell stays in the 6ft to 8ft range, but it’s back to short-period ENE windswell (8-9 seconds). The combined energy sits between 772 and 1000 (moderate). The wind stays cross-off, but it’s fresh to occasionally strong, especially on Monday the 21st. This is marginal at best, and the waves will be bumpy and hard to read. For the kites out there, this setup looks more interesting than paddle surfing.
The middle of the second week, from Wednesday the 23rd through Saturday the 27th, is a mixed bag. Swell drops back a bit, mostly 5ft to 7ft, still ENE. Periods remain short, and energy slowly fades from 941 down to 531. The wind is a persistent moderate to fresh cross-off. It’s clean, but the waves are weak and wind-affected. It's a grind, not a highlight.
The real standout for the whole forecast period is Sunday the 29th. On that Tuesday morning (the 29th), we see a return of a 6ft ENE swell with a short 8-second period, but the combined energy is still moderate (687) and the wind finally backs off to a moderate cross-off. It’s not perfect, but for a late-season session, it’s the best of a messy run.
In the end, Thursday the 17th morning and Tuesday the 29th morning are your best bets for some punch above the average, but Thursday the 18th morning (with that long-period 17s SSW swell and 3ft) is the truest standout for quality wave shape. The water temp anomaly is about average for mid-September, so a 3/2mm fullsuit should be fine.
Rusty signing off.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Sun night). Mainly fresh winds. | Days 5-7 Weather SummaryModerate rain (total 14mm), heaviest on Thu night. Warm (max 27°C on Thu afternoon, min 26°C on Wed night). Mainly fresh winds. | ||||||||||||||||||
Monday 14 | Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | ||||||||||||||
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 12 | SW 23 | SW 22 | SW 21 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | ENE 8 | ENE 9 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | ENE 8 | ENE 8 | E 8 |
Wave Graph | |||||||||||||||||||
38 | 86 | 227 | 224 | 392 | 384 | 470 | 455 | 541 | 429 | 525 | 637 | 644 | 622 | 580 | 539 | 473 | 449 | 581 | |
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 | cross-off | cross-off | cross-off | cross-off |
High Tide | 6:14AM0.58m | 5:40PM0.36m | 7:02AM0.58m | 6:07PM0.30m | 7:59AM0.57m | 6:32PM0.25m | 9:10AM0.56m | 7:25PM0.21m | 10:27AM0.57m | 11:01PM0.21m | 11:34AM0.59m | 00:19AM0.23m | |||||||
Low Tide | 11:19PM0.06m | 12:45PM0.20m | 11:42PM0.08m | 2:03PM0.23m | 00:07AM0.11m | 4:06PM0.24m | 00:38AM0.13m | 7:14PM0.21m | 1:26AM0.16m | 7:23PM0.18m | 2:56AM0.18m | 7:43PM0.16m | 4:35AM0.17m | ||||||
— | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | 6:18 | — | — | |
6:36 | — | 6:35 | — | — | 6:34 | — | — | 6:32 | — | — | 6:31 | — | — | 6:30 | — | — | 6:30 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | 3 | 9 | — | — | 2 | — | — | — |
Temp °C | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 26 |
Feels °C | 26 | 25 | 26 | 27 | 28 | 27 | 26 | 27 | 26 | 26 | 25 | 27 | 26 | 25 | 25 | 26 | 26 | 25 | 24 |
Swell 1 Height (m) Direction Period (s) | NE 9 | NE 8 | NE 8 | NE 8 | SW 20 | SW 19 | SSW 19 | SW 18 | SSW 18 | SW 17 | SW 16 | SW 16 | SSW 18 | SSW 17 | SSW 17 | SSW 16 | SSW 16 | SSW 16 | SSW 16 |
79 | 58 | 54 | 31 | 392 | 384 | 470 | 455 | 541 | 429 | 258 | 258 | 644 | 622 | 580 | 539 | 382 | 387 | 273 | |
Swell 2 Height (m) Direction Period (s) | SW 12 | SW 14 | SW 22 | SW 21 | NNE 8 | E 12 | NNE 8 | SW 12 | SW 11 | SSW 11 | SSW 20 | SSW 19 | SSE 10 | SSE 9 | SSE 6 | SSE 7 | SSW 18 | SSE 6 | SW 16 |
38 | 49 | 227 | 224 | 24 | 68 | 22 | 35 | 43 | 12 | 149 | 210 | 9 | 8 | 15 | 15 | 108 | 15 | 122 | |
Swell 3 Height (m) Direction Period (s) | ENE 8 | SW 23 | SW 14 | SSW 13 | E 12 | SW 12 | E 11 | S 9 | S 8 | SSE 11 | SW 11 | SSE 10 | WSW 10 | W 9 | W 9 | S 20 | SSE 6 | S 18 | SSW 14 |
14 | 86 | 49 | 68 | 46 | 38 | 58 | 6 | 5 | 12 | 18 | 10 | 9 | 2 | 7 | 67 | 12 | 99 | 37 | |
Wind waves Height (m) Direction Period (s) | ENE 4 | ENE 5 | ENE 4 | ENE 5 | ENE 5 | NE 8 | ENE 5 | ENE 10 | ENE 6 | ENE 7 | ENE 8 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | E 8 |
8 | 28 | 26 | 37 | 37 | 99 | 66 | 331 | 181 | 374 | 525 | 637 | 608 | 472 | 383 | 496 | 473 | 449 | 581 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 3 | 1 | 1 | 1 | 1 | 31 | 4 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 2 | 42 | 33 | 31 |
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.










