
Surf Forecasts:
Number Fours surf forecast from 28 Jul 2026:
- Best quality surf: Tuesday 28 Jul, 11PM (local time) - 7.5ft (2.3m), 12s period, ENE swell with offshore winds.
- Most powerful swell: Tuesday 28 Jul, 2PM (local time) - 8ft (2.4m), 13s period, E swell with 1,999 kJ wave energy.
- Next surfable swell (1★+): Tuesday 28 Jul, 11PM (local time) - 7.5ft (2.3m), 12s 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 (Jul 28) at 11PM. The primary swell is predicted to be 2.3m and 12s 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 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 1.6m 6s period and expected on Monday (Jul 27) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 28th Jul) | 7.5ft (2.3m) 12s |
| Best Surf | 11PM (Tue 28th Jul) | 7.5ft (2.3m) 12s |
| Most Powerful | 2PM (Tue 28th Jul) | 8ft (2.4m) 13s |
Table - best surf conditions forecast for Number Fours over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what Number Fours is cooking up over the next couple of weeks.
First thing’s first – the water’s sitting at 80°, which is pretty much bang on average for this time of year, so no worries there.
The outlook for Number Fours is a bit of a mixed bag, to be honest. We’ve got a solid window of surfable waves, but the quality is going to be a constant battle with the wind. The real standout, the one that has me a little excited, is the Tuesday the 28th of July. That morning, we’ve got a clean 7ft easterly swell with a long 13-second period pushing in. The combined energy is a hefty 1820 (moderate to strong), which means there’s some real grunt behind it. The wind is a cross-offshore breeze, which should keep the face nice and clean for intermediate crew. That afternoon it even bumps up to 8ft, but the energy is even higher at 2070, so it’s still worth a paddle. Just keep in mind, with a swell that size and a long period, Number Fours (a reef) should handle it well, but it might be a bit much for beginners.
The run-up to that standout is a bit of a write-off. Monday the 27th has a clean 5ft swell, but with a 19 mph cross-off wind, it’s going to be a battle. The energy is only 1022 (moderate), and the forecast calls it marginal, so I’d probably give it a miss.
After that Tuesday peak, the quality drops off. Wednesday the 29th shows a 7ft swell, but the wind swings onshore, which is a real shame. The energy drops to 930, and it’s just not going to be the same. Thursday and Friday look pretty average with strong winds and short-period, choppy energy.
There’s a long, quiet gap from the 31st of July right through to the 9th of August. The wind is howling from the ENE at 19 to 28 mph most days, and while the swell sticks around, the period is short (7-8 seconds) and the conditions are consistently described as poor. The energy is all over the place, but it’s all wind chop. Not worth your time.
Now, towards the very end of the outlook, we get a flicker of hope. Tuesday the 11th of August in the afternoon looks interesting. It’s a tiny 3ft swell, but it’s from the SSW with a very long 15-second period, giving it some shape. The combined energy is 512 (weak). The key here is the wind goes light and offshore, with a little bit of light rain. The forecast is literally “expect very good surf conditions,” which is a rare thing to see in this data. It’s a long way out, so take it with a grain of salt, but it’s the only other real standout in the whole period.
For the rest of the time, with the constant strong cross-offshore winds and the beach break setup, this might actually look more interesting for the kite surfers than us paddle surfers.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Wed night. Warm (max 27°C on Tue morning, min 25°C on Mon night). Winds decreasing (fresh winds from the NE on Mon afternoon, calm by Wed night). | Days 5-7 Weather SummaryMostly dry. Warm (max 27°C on Thu afternoon, min 24°C on Sat night). Winds increasing (moderate winds from the E on Thu afternoon, strong winds from the ENE by Sat morning). | |||||||||||||||||||
Mon 27 | Tuesday 28 | Wednesday 29 | Thursday 30 | Friday 31 | Saturday 1 | Sunday 2 | ||||||||||||||
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 | E 13 | E 13 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | ENE 8 | SSW 18 | E 7 | E 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph | ||||||||||||||||||||
792 | 1391 | 1667 | 1872 | 1111 | 718 | 381 | 284 | 246 | 222 | 285 | 329 | 426 | 858 | 893 | 850 | 893 | 678 | 682 | 578 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | off | cross-on | on | cross-on | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 3:29PM0.70m | 3:10AM0.23m | 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 | |||||||
Low Tide | 10:49PM0.10m | 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 | |||||||
— | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | |
7:12 | — | — | 7:12 | — | — | 7:10 | — | — | 7:10 | — | — | 7:09 | — | — | 7:09 | — | — | 7:08 | — | |
mm | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 26 | 25 | 27 | 27 | 25 | 27 | 27 | 26 | 27 | 27 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 24 | 24 | 28 | 27 | 25 | 29 | 29 | 30 | 28 | 25 | 25 | 24 | 22 | 22 | 21 | 20 | 21 | 22 | 21 | 22 |
Swell 1 Height (m) Direction Period (s) | E 13 | E 13 | E 13 | E 13 | ENE 11 | ENE 10 | ENE 9 | ENE 8 | S 14 | ENE 8 | S 13 | S 12 | E 16 | E 14 | E 14 | E 14 | E 14 | E 14 | E 14 | E 13 |
792 | 1391 | 1667 | 1872 | 1111 | 718 | 381 | 284 | 181 | 173 | 166 | 113 | 301 | 202 | 264 | 253 | 257 | 187 | 198 | 126 | |
Swell 2 Height (m) Direction Period (s) | SSW 15 | SSW 14 | SSW 14 | S 14 | NNE 6 | S 14 | S 14 | S 14 | SW 18 | S 13 | SSW 16 | SW 16 | SW 15 | SW 15 | SSW 14 | SSW 14 | SSW 14 | SSW 14 | SSW 13 | SSW 13 |
222 | 213 | 143 | 179 | 68 | 195 | 195 | 184 | 154 | 222 | 177 | 206 | 239 | 220 | 127 | 123 | 131 | 133 | 68 | 56 | |
Swell 3 Height (m) Direction Period (s) | S 10 | SE 11 | SSE 10 | SSE 10 | SSW 14 | SW 21 | SSW 20 | SW 19 | E 19 | SSW 18 | E 16 | E 15 | S 12 | SSW 12 | S 12 | S 11 | S 11 | N 9 | S 11 | SW 13 |
8 | 4 | 10 | 19 | 195 | 17 | 37 | 95 | 29 | 207 | 127 | 159 | 106 | 47 | 43 | 39 | 22 | 14 | 9 | 42 | |
Wind waves Height (m) Direction Period (s) | NE 7 | NE 7 | NNE 8 | NNE 9 | — | — | — | — | ENE 8 | — | E 7 | E 8 | ENE 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
262 | 194 | 154 | 190 | — | — | — | — | 246 | — | 285 | 329 | 426 | 858 | 893 | 850 | 893 | 678 | 682 | 578 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 31 | 1 | 1 | 7 | 0 | 16 | 17 | 16 | 31 | 31 | 31 | 39 | 126 | 126 | 147 | 126 | 42 | 42 | 42 | 34 |
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.










