
Surf Forecasts:
Number Fours surf forecast from 2 Aug 2026:
- Best quality surf: Tuesday 4 Aug, 5AM (local time) - 5ft (1.6m), 11s period, ENE swell with cross-offshore winds.
- Most powerful swell: Sunday 2 Aug, 5AM (local time) - 8ft (2.5m), 8s period, ENE swell with 844 kJ wave energy.
- Next surfable swell (1★+): Tuesday 4 Aug, 5AM (local time) - 5ft (1.6m), 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 5AM. The primary swell is predicted to be 1.6m 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 2.5m 8s and forecast to arrive on Sunday (Aug 02) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Friday (Aug 07) at 2PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Tue 4th Aug) | 5ft (1.6m) 11s |
| Best Surf | 5AM (Tue 4th Aug) | 5ft (1.6m) 11s |
| Most Powerful | 5AM (Sun 2nd Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
G’day, Rusty here. Look, I’m gonna be straight with you: this stretch at Number Fours is a bit of a mixed bag. The water temp’s sitting about average for this time of year, nothing to write home about. We’ve got a solid little window of cleaner surf midweek, but the rest of the run is mostly marginal or poor, so you’ll need to pick your moments.
We kick off Sunday the 2nd of August with a lumpy 8ft swell from the ENE, period a short 8 seconds, and a fresh cross-off breeze. The energy’s moderate at 1099, but the conditions are only marginal at best—tide’s working against us. It stays average into Monday the 3rd with a 5ft ENE swell, still cross-off, and the energy drops to 523. Honestly, it’s not great for paddling into.
Tuesday the 4th is where things start looking up. Morning shows a 5ft ENE swell with a longer 11-second period, clean with a gentle breeze, and energy at 587. By Tuesday afternoon, it’s expecting very good surf—5ft ENE swell, still 11 seconds, gentle cross-off, and energy at 534. The water’s feeling average temp-wise, but the waves are shaping up nicely. This is the standout for the week. Wednesday the 5th holds small but fun: 4ft ENE swell, 10-second period, gentle breeze, good conditions in the morning, and energy at 372. It’s a good day for a longboard or a fish.
From Thursday the 6th, it starts to fade. Thursday morning’s 4ft ENE swell, 8 seconds, with a moderate breeze—marginal. By Friday the 7th, we’re into poor territory with a weird 1ft SW swell pushing 21 seconds, energy at 311, but the wind’s howling at 19 mph. Not worth it.
There’s a gap of poor conditions from Saturday the 8th through to Monday the 11th of August—strong breezes, storm risks, and weak, choppy swells. Don’t bother.
Then we get a little pulse on Wednesday the 12th: a 3ft S swell with a 18-second period, energy at 909, but it’s marginal and cross-off. The 13th of August offers a similar story: 4ft S swell, 16 seconds, moderate energy at 874, but again, marginal. The wind stays fresh and cross-off, so it’s not clean enough to get excited about.
From the 14th to the 16th of August, we’re stuck in a long run of marginal days—S swells around 3ft to 4ft, 15 to 16 seconds, energy in the 700 to 800 range, but always cross-off winds. The 14th through 16th mornings are all marginal, and the 16th afternoon brings a 6ft ENE swell, 7 seconds, energy at 651—still poor. The last call on the 17th of August is a 6ft ENE swell, 8 seconds, energy at 585, but it’s marginal again.
Best bet? Tuesday the 4th of August afternoon. That’s your window. 5ft ENE swell, 11-second period, gentle cross-off, clean conditions, and the forecast says “very good.” That’s the one to circle.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Sun morning, min 24°C on Sun night). Winds decreasing (strong winds from the ENE on Sat night, light winds from the NE by Tue afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Wed morning, min 25°C on Tue night). Mainly fresh winds. | ||||||||||||||||||
Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 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 8 | ENE 8 | ENE 12 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | SW 14 | SW 21 | SW 20 | ENE 7 |
Wave Graph | |||||||||||||||||||
979 | 720 | 627 | 527 | 344 | 277 | 701 | 515 | 415 | 388 | 269 | 203 | 161 | 192 | 146 | 102 | 115 | 129 | 219 | |
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 | 6:49AM0.38m | 6:24PM0.52m | 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 | |||||||
Low Tide | 00:48AM0.05m | 12:06PM0.16m | 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 | |||||||
— | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
7:09 | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 22 | 23 | 22 | 22 | 25 | 24 | 24 | 27 | 27 | 26 | 28 | 27 | 28 | 27 | 25 | 25 | 25 | 25 | 23 |
Swell 1 Height (m) Direction Period (s) | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | SSW 12 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | SSW 14 | SSW 14 | SSW 14 |
194 | 246 | 192 | 125 | 84 | 108 | 56 | 515 | 415 | 388 | 269 | 203 | 161 | 128 | 146 | 37 | 76 | 73 | 108 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | SSW 14 | SSW 13 | SW 12 | SSW 13 | SSW 12 | SSE 9 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 15 | SSW 14 | SSW 14 | SSW 14 | SW 14 | SSE 11 | SW 20 | SW 19 |
131 | 133 | 67 | 40 | 53 | 50 | 17 | 46 | 51 | 47 | 47 | 88 | 82 | 81 | 80 | 102 | 23 | 99 | 96 | |
Swell 3 Height (m) Direction Period (s) | S 11 | N 9 | N 9 | SSW 13 | SW 13 | SW 13 | S 13 | SSW 16 | SW 16 | SW 15 | SSE 13 | SSW 11 | SSE 12 | SSE 12 | S 11 | SSE 11 | SW 21 | S 11 | NE 11 |
22 | 15 | 14 | 34 | 42 | 41 | 13 | 26 | 68 | 57 | 56 | 39 | 48 | 26 | 22 | 40 | 115 | 20 | 19 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 12 | — | — | — | — | — | — | ENE 8 | — | ENE 5 | ENE 7 | ENE 6 | ENE 7 |
979 | 720 | 627 | 527 | 344 | 277 | 701 | — | — | — | — | — | — | 192 | — | 39 | 97 | 129 | 219 | |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 48 | 128 | 46 | 34 | 2 | 34 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 31 | 33 | 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.











