
Surf Forecasts:
Number Fours surf forecast from 3 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 8AM (local time) - 5ft (1.5m), 11s period, ENE swell with cross-offshore winds.
- Most powerful swell: Tuesday 4 Aug, 2AM (local time) - 5ft (1.6m), 12s period, ENE swell with 701 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 8AM (local time) - 5ft (1.5m), 11s period with ENE swell.
Best Forecast Surf Conditions for Number Fours this week:
The surf forecast for Number Fours over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 04) at 8AM. The primary swell is predicted to be 1.5m and 11s period with a secondary swell of 0.4m and 12s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Number Fours in the next 16 days are 1.6m 12s and forecast to arrive on Tuesday (Aug 04) at 2AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.6m 6s period and expected on Friday (Aug 07) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 8AM (Tue 4th Aug) | 5ft (1.5m) 11s |
| Best Surf | 8AM (Tue 4th Aug) | 5ft (1.5m) 11s |
| Most Powerful | 2AM (Tue 4th Aug) | 5ft (1.6m) 12s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s talk about what’s in store for Number Fours. This is a reef setup, exposed to the swell, and the main window is clean, cross-off winds from the ENE most of the time. The water temp is about average for the time of year, nothing weird going on there.
Right now, the surf is a bit of a mess. The first couple of days are not worth your time—Monday is a no-go with strong winds and short-period, disorganised lines. The combined swell energy is moderate (503), but the quality just isn’t there. The best bet on offer is Tuesday the 4th. That morning, we’ve got a 5ft groundswell from the ENE with a period of 11 seconds, and the energy is moderate (587). The wind is a gentle breeze, cross-off, so the face will be clean. This is the standout of the whole forecast—a proper, workable reef wave. Expect some company though, as crowds are sometimes an issue here.
Wednesday the 5th is smaller, with 4ft and 4ft, period dropping to 9-10 seconds. It’s still clean but the quality drops. The energy is weaker (356 and 315). Thursday the 6th falls off a cliff—tiny, weak, with a very long period 14-second SSW windswell that’s barely 2ft. That’s not surfable. Friday the 7th is even worse, with a 21-second period and almost no height. The whole stretch from Thursday to Sunday the 9th is poor, with the swell picking up again on the weekend but with short, choppy 7-second ENE windswell and strong winds. The energy is moderate (542-600) but the conditions are messy—better for a kite than a paddle.
The second week starts with a run of poor surf. Monday the 10th and Tuesday the 11th are still short-period, wind-affected, and not worth suiting up. There’s a flicker of hope on Wednesday the 12th and Thursday the 13th, with a 3ft long-period S swell (16-18 seconds) and moderate energy (813-880). The wind is cross-off, so it’ll be clean, but the size is small and the period is very long, which can make a reef break like Number Fours a bit tricky—the sets might be few and far between. Still, if you’re patient, it’s the best of a weak bunch.
Friday the 14th to Sunday the 16th sees a rise in short-period ENE swell again, hitting 6ft on the 16th, but with strong to strong breeze winds, these are blown-out and only for the experienced. The energy is moderate (565-644), but the quality is poor. Monday the 17th and Tuesday the 18th continue the same theme—short, messy, and not recommended.
So, the one true standout is Tuesday the 4th. That’s your day. The rest is a lot of waiting and hoping.
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Mon afternoon, min 25°C on Sun night). Mainly fresh winds. | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Thu morning, min 25°C on Wed night). Mainly fresh winds. | ||||||||||||||||||
Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | Saturday 8 | ||||||||||||||
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 12 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | SSW 14 | ENE 8 | SW 14 | SW 21 | SW 20 | ENE 6 | ENE 7 | ENE 7 | ENE 7 |
Wave Graph | |||||||||||||||||||
541 | 344 | 277 | 701 | 515 | 436 | 352 | 253 | 188 | 88 | 81 | 122 | 102 | 115 | 99 | 225 | 247 | 198 | 240 | |
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-off |
High Tide | 7:47AM0.42m | 6:55PM0.44m | 8:56AM0.47m | 7:27PM0.36m | 10:11AM0.53m | 8:07PM0.29m | 11:24AM0.60m | 9:30PM0.22m | 12:27PM0.67m | 11:32PM0.19m | 1:22PM0.73m | 00:59AM0.19m | |||||||
Low Tide | 1:15AM0.04m | 1:14PM0.22m | 1:46AM0.04m | 2:52PM0.27m | 2:23AM0.03m | 5:19PM0.27m | 3:10AM0.03m | 7:39PM0.21m | 4:08AM0.02m | 8:34PM0.16m | 5:14AM0.01m | 9:09PM0.12m | |||||||
— | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:07 | — | — | |
7:08 | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | — | 7:06 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 |
Temp °C | 25 | 26 | 27 | 26 | 27 | 27 | 26 | 26 | 27 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 23 | 24 | 26 | 26 | 28 | 28 | 27 | 26 | 27 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 23 | 23 |
Swell 1 Height (m) Direction Period (s) | E 13 | E 13 | E 12 | SSW 12 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | SSW 14 | ENE 8 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 |
125 | 84 | 108 | 56 | 515 | 436 | 352 | 253 | 188 | 88 | 45 | 80 | 32 | 77 | 73 | 108 | 113 | 101 | 99 | |
Swell 2 Height (m) Direction Period (s) | SW 12 | SSW 13 | SSW 12 | SSE 9 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 15 | SSW 14 | SSW 14 | S 11 | SW 14 | SSE 11 | SW 20 | SW 19 | SW 18 | SSW 18 | SW 18 |
40 | 33 | 50 | 9 | 46 | 51 | 47 | 47 | 88 | 82 | 81 | 22 | 102 | 38 | 99 | 95 | 164 | 124 | 150 | |
Swell 3 Height (m) Direction Period (s) | SSW 13 | SW 13 | SW 13 | W 14 | SSW 16 | SW 16 | SW 15 | SSE 13 | SSW 11 | SSE 12 | SSE 11 | SSW 10 | SSE 11 | SW 21 | S 11 | NE 11 | SSE 10 | SSE 10 | SSE 10 |
58 | 42 | 41 | 16 | 26 | 68 | 57 | 56 | 39 | 49 | 25 | 9 | 40 | 115 | 20 | 19 | 18 | 18 | 19 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 12 | — | — | — | — | — | ENE 6 | ENE 6 | ENE 8 | ENE 5 | ENE 7 | ENE 5 | ENE 6 | ENE 7 | ENE 7 | ENE 7 |
541 | 344 | 277 | 701 | — | — | — | — | — | 64 | 53 | 122 | 25 | 78 | 59 | 225 | 247 | 198 | 240 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 34 | 34 | 39 | 1 | 0 | 0 | 1 | 31 | 1 | 1 | 31 | 31 | 2 | 31 | 39 | 31 | 31 | 39 | 32 |
Best forecast wave conditions in Oahu | |||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||
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Information about the Number Fours Surf forecast
The above surf forecast table for Number Fours provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Number Fours can be found by selecting the local surf guide option on the grey menu. Our Number Fours 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 Fours) 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 Fours 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 Fours 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.











