Surf Forecasts:
Number Fours surf forecast from 29 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 5AM (local time) - 6.5ft (2.0m), 11s period, ENE swell with offshore winds.
- Most powerful swell: Saturday 1 Aug, 8AM (local time) - 10ft (3.0m), 8s period, ENE swell with 984 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 5AM (local time) - 6.5ft (2.0m), 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 Wednesday (Jul 29) at 5AM. The primary swell is predicted to be 2.0m and 11s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Number Fours in the next 16 days are 3.0m 8s and forecast to arrive on Saturday (Aug 01) at 8AM. 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 7s period and expected on Wednesday (Jul 29) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 29th Jul) | 6.5ft (2.0m) 11s |
| Best Surf | 5AM (Wed 29th Jul) | 6.5ft (2.0m) 11s |
| Most Powerful | 8AM (Sat 1st Aug) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s see what’s going on at Number Fours.
We’ve got a short window of fun right at the start, then it’s a long grind. Wednesday, July 29th, is the day. The morning has some clouds, a light cross-off breeze from the NNE at only 3 mph. The swell is a solid 6 ft from the ENE with a 10-second period, and the combined energy is moderate at 909. The water is about average for this time of year. It’s clean, and the afternoon turns glassy with the same light wind. That’s your best bet – a real treat for a midweek surf.
After that, it’s a steady decline. Thursday starts with a strong cross-shore wind from the East at 12 mph, making it marginal. The swell is 5 ft but short-period at 8 seconds, and the energy drops (585). The afternoon sees a weird 3 ft swell from the south with a long 13-second period, but the wind is howling at 16 mph. Not worth paddling out.
Friday, July 31st, is a washout. Strong breeze at 25 mph from the ENE, swell around 6 ft to 7 ft, and the energy is building (855-1083). The wind is just too strong.
Saturday, August 1st, is for experts only. Swell hits 8 ft from the ENE, but it’s blowing a gale at 28 mph. The energy is strong (1375), but that’s kitesurfing weather, not paddle surfing. Same story for Sunday, August 2nd, and Monday, August 3rd – strong winds, marginal to poor conditions.
Tuesday, August 4th, shows a slight improvement. The wind drops to 12 mph, and the swell is 5 ft from the ENE with a longer 11-second period, giving moderate energy (679). Still cross-off, so it’s a bit of a fight. Wednesday, August 5th, is small and clean, with only 4 ft to 4 ft.
From Thursday, August 6th, onward, it’s a long, poor stretch. Winds are strong, swells are short-period or weak, and the energy is low. There’s a tiny pulse of long-period SSW groundswell on August 9th and 10th, with 3 ft to 3 ft at 16-18 seconds (energy around 600-700), but the wind is still up. That long period will make those waves fat and straight at the beach.
So, the only real standout is Wednesday, July 29th. Get in early, because after that, we’re looking at a solid week and a half of nothing. It’s a rough patch, but it can’t stay this bad forever. Forecasts can change.
Stay salty,
Rusty
Short Range ForecastMostly dry. Warm (max 27°C on Wed afternoon, min 25°C on Tue night). Winds increasing (calm on Wed afternoon, strong winds from the ENE by Fri afternoon). | Days 5-7 Weather SummaryMostly dry. Warm (max 26°C on Sun afternoon, min 24°C on Fri night). Winds decreasing (strong winds from the ENE on Sat morning, moderate winds from the ENE by Sun night). | ||||||||||||||||||
Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | ||||||||||||||
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 11 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | ENE 7 | E 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | ENE 12 |
Wave Graph  | |||||||||||||||||||
 kJ | 1126 | 697 | 413 | 221 | 250 | 225 | 292 | 337 | 437 | 880 | 939 | 956 | 915 | 737 | 699 | 592 | 370 | 355 | 838 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | glassy | cross-off | 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 | cross-off |
High Tide | 3:49AM0.25m | 4:29PM0.70m | 4:28AM0.28m | 4:58PM0.68m | 5:11AM0.31m | 5:26PM0.64m | 5:57AM0.34m | 5:55PM0.59m | 6:49AM0.38m | 6:24PM0.52m | 7:47AM0.42m | 6:55PM0.44m | |||||||
Low Tide | 11:11PM0.09m | 9:09AM0.01m | 11:34PM0.08m | 9:48AM0.03m | 11:58PM0.07m | 10:29AM0.06m | 00:22AM0.06m | 11:14AM0.11m | 00:48AM0.05m | 12:06PM0.16m | 1:15AM0.04m | 1:14PM0.22m | 1:46AM0.04m | ||||||
 |  | |  | |  | | | | | | | | | | | | | | |
 | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 7:12 | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 26 | 27 | 26 | 27 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 26 | 29 | 31 | 29 | 28 | 27 | 25 | 23 | 22 | 21 | 20 | 20 | 21 | 22 | 23 | 22 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | ENE 11 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | S 13 | S 12 | E 16 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | ENE 12 |
| kJ | 1126 | 697 | 413 | 221 | 250 | 210 | 166 | 153 | 301 | 205 | 267 | 257 | 260 | 334 | 200 | 126 | 123 | 146 | 838 |
Swell 2 Height (m) Direction Period (s) | SSW 14 | S 14 | S 14 | S 14 | S 14 | S 13 | SSW 16 | SW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 | SW 13 | SW 13 | SSW 12 |
| kJ | 195 | 195 | 195 | 184 | 181 | 225 | 177 | 206 | 239 | 223 | 127 | 123 | 131 | 131 | 68 | 57 | 42 | 41 | 48 |
Swell 3 Height (m) Direction Period (s) | SW 21 | SW 21 | SSW 20 | N 7 | SW 18 | SSW 18 | E 16 | E 15 | S 12 | S 12 | S 12 | S 11 | S 11 | N 9 | N 9 | SW 13 | SSW 13 | SSW 12 | SSE 9 |
| kJ | 18 | 17 | 37 | 47 | 154 | 207 | 127 | 159 | 106 | 69 | 42 | 39 | 22 | 15 | 13 | 42 | 31 | 29 | 17 |
Wind waves Height (m) Direction Period (s) | NNE 9 | — | — | — | — | — | ENE 7 | E 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 9 | — |
| kJ | 151 | — | — | — | — | — | 292 | 337 | 437 | 880 | 939 | 956 | 915 | 737 | 699 | 592 | 370 | 355 | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 1 | 0 | 0 | 0 | 31 | 31 | 31 | 39 | 46 | 126 | 128 | 126 | 42 | 39 | 42 | 1 | 34 | 1 | 1 |
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.
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