
Surf Forecasts:
Number Fours surf forecast from 29 Jul 2026:
- Best quality surf: Wednesday 29 Jul, 2AM (local time) - 7ft (2.2m), 11s period, ENE swell with offshore winds.
- Most powerful swell: Tuesday 28 Jul, 5PM (local time) - 8ft (2.4m), 13s period, E swell with 1,909 kJ wave energy.
- Next surfable swell (1★+): Wednesday 29 Jul, 2AM (local time) - 7ft (2.2m), 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 2AM. The primary swell is predicted to be 2.2m and 11s period with a secondary swell of 0.7m and 14s. 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 2.4m 13s and forecast to arrive on Tuesday (Jul 28) at 5PM. 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 9s period and expected on Wednesday (Jul 29) at 8PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Wed 29th Jul) | 7ft (2.2m) 11s |
| Best Surf | 2AM (Wed 29th Jul) | 7ft (2.2m) 11s |
| Most Powerful | 5PM (Tue 28th Jul) | 8ft (2.4m) 13s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Right, let’s have a look at what’s on the cards for the next couple of weeks at Number Fours.
Well, the first real standout looks like Wednesday morning the 29th of July. That’s the one to get excited about. The water’s sitting at 80°, bang on average for this time of year, so nothing unusual there. Swell’s dropping a touch from the days before, but we’ve got a clean 6 ft from the ENE, with a period of 10 seconds – that’s a nice, punchy groundswell with some proper shape. The real magic is the wind: glass. Absolutely dead calm. That’s going to give you silky-smooth, clean faces. The combined energy is moderate (909), solid enough for a good session. It’s a reef break, so that long period will wrap in nicely, and it’s fairly consistent. Crowds are only a possibility, not a given. For an intermediate, this is as good as it gets right now.
The morning of Tuesday the 28th is actually the biggest swell in the window, with 7 ft from the E and a 13-second period. That’s a proper groundswell, with strong wave energy (1820). But the wind is a cross-off from the NE at 15 mph. It’s clean, but not perfect. The size is pushing into that territory where it’s more for the experienced crew, not beginners. It’s a good session, but that Wednesday morning is the cleaner option.
After that, the week turns into a bit of a grind. Wednesday afternoon the 29th is still clean and fun at 6 ft, but the wind picks up a little. Thursday the 30th is smaller and the wind starts to build. Friday the 31st and the weekend of the 1st and 2nd of August see the wind really cranking – strong breezes from the ENE, with the swell sitting around 7 ft to 10 ft, but the period drops to 8 seconds. That’s short-period, wind-affected slop, and the combined energy is moderate to strong (up to 1420), but it’s not going to be pretty. The wind is cross-off, so it’s not directly onshore, but it’s strong enough to mess with the surface. For a beach and reef setup, it might actually be more interesting for the kite surfers than us paddle folk.
Monday the 3rd and Tuesday the 4th of August see the swell back down to 5 ft to 5 ft, with a return to a longer period on Tuesday (12 seconds). But the wind is still a moderate to fresh breeze, cross-off. It’s surfable, but nothing to write home about.
The second week is a bit of a mixed bag. From the 5th to the 8th of August, it’s mostly poor with strong winds and short-period, wind-affected swell. Then on the 9th and 10th, a new long-period SSW groundswell shows up, 16 to 18 seconds, but it’s small – only 3 ft to 4 ft. The combined energy is moderate (up to 907). That’s a very long period, which can be tricky at a beach break, but at a reef it could offer some nice, clean lines if the wind plays ball. The wind is cross-off, clean enough. It’s a promising but less certain call that far out.
The 11th of August is a similar story, small long-period SSW swell. Then the 12th of August finishes the window with a return to short-period, wind-affected ENE junk.
So, if you’re looking for the best of the bunch, lock in Wednesday morning, the 29th of July. After that, the early part of the second week (the 10th and 11th of August) might offer a few fun ones if the long-period holds, but it’s a gamble.
Rusty.
Short Range ForecastSome drizzle, heaviest during Wed night. Warm (max 27°C on Tue morning, min 24°C on Tue night). Winds increasing (calm on Wed morning, fresh winds from the ENE by Thu night). | Days 4-6 Weather SummaryMostly dry. Warm (max 26°C on Fri morning, min 24°C on Fri night). Winds decreasing (strong winds from the ENE on Sat morning, moderate winds from the NE by Sun night). | ||||||||||||||||||||
Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | |||||||||||||||
AM | PM | 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) | E 13 | E 13 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | E 13 |
Wave Graph | |||||||||||||||||||||
1667 | 1909 | 1126 | 697 | 497 | 267 | 291 | 225 | 292 | 427 | 437 | 1041 | 984 | 889 | 1071 | 865 | 678 | 541 | 344 | 277 | 284 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | off | glassy | cross-off | cross-on | 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 | 3:59PM0.70m | 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 | 8:31AM0.01m | 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 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | |
— | 7:12 | — | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | |
mm | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 27 | 27 | 25 | 26 | 26 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 28 | 27 | 26 | 30 | 30 | 29 | 27 | 26 | 26 | 22 | 22 | 21 | 19 | 20 | 21 | 22 | 22 | 23 | 24 | 24 | 24 |
Swell 1 Height (m) Direction Period (s) | E 13 | E 13 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | S 13 | S 12 | E 16 | E 15 | E 14 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 13 |
1667 | 1909 | 1126 | 697 | 497 | 267 | 291 | 215 | 166 | 113 | 301 | 267 | 264 | 253 | 260 | 261 | 198 | 198 | 126 | 121 | 268 | |
Swell 2 Height (m) Direction Period (s) | SSW 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 14 | S 13 | SSW 16 | E 15 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 | SW 14 | SSW 13 | SSW 13 | SW 13 | SSW 12 | SSW 12 |
143 | 179 | 184 | 195 | 195 | 184 | 181 | 225 | 177 | 159 | 239 | 220 | 127 | 123 | 131 | 96 | 67 | 57 | 42 | 29 | 48 | |
Swell 3 Height (m) Direction Period (s) | SSE 10 | — | SW 21 | SW 21 | SSW 20 | SW 19 | SW 18 | SSW 18 | E 16 | SW 16 | S 12 | SSW 12 | SSW 12 | S 11 | S 11 | N 9 | N 9 | SW 13 | SSW 13 | SW 13 | S 13 |
10 | — | 18 | 17 | 37 | 58 | 154 | 207 | 127 | 206 | 106 | 47 | 45 | 39 | 22 | 7 | 13 | 42 | 33 | 41 | 14 | |
Wind waves Height (m) Direction Period (s) | NNE 8 | NNE 9 | NNE 9 | — | — | — | — | — | E 8 | ENE 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
173 | 190 | 151 | — | — | — | — | — | 292 | 427 | 437 | 1041 | 984 | 889 | 1071 | 865 | 678 | 541 | 344 | 277 | 284 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 4 | 0 | 0 | 0 | 1 | 1 | 31 | 39 | 42 | 46 | 127 | 147 | 46 | 48 | 39 | 155 | 1 | 39 | 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.










