
Surf Forecasts:
Number Fours surf forecast from 13 Jul 2026:
- Best quality surf: Wednesday 15 Jul, 5AM (local time) - 2.5ft (0.7m), 17s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 13 Jul, 8AM (local time) - 6ft (1.9m), 8s period, ENE swell with 411 kJ wave energy.
- Next surfable swell (1★+): Wednesday 15 Jul, 5AM (local time) - 2.5ft (0.7m), 17s period with SW 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 15) at 5AM. The primary swell is predicted to be 0.7m and 17s period. 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 1.9m 8s and forecast to arrive on Monday (Jul 13) 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 1.4m 8s period and expected on Tuesday (Jul 14) at 11AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Wed 15th Jul) | 2.5ft (0.7m) 17s |
| Best Surf | 5AM (Wed 15th Jul) | 2.5ft (0.7m) 17s |
| Most Powerful | 8AM (Mon 13th Jul) | 6ft (1.9m) 8s |
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’s on the cards for Number Fours over the next couple of weeks.
Straight up, the outlook is a tough one. This is a reef break that’s exposed to swells, and right now it’s locked into a frustrating pattern. The water temp is sitting at 79°, which is pretty much spot on for this time of year, so nothin’ unusual there.
The first week is a real struggle. We’re looking at a solid ENE wind blowing at 18 mph, which is giving us a clean, cross-off look, but the wave quality is being called marginal at best. The swell is coming from the ENE, but it’s short-period stuff – around 8 seconds – and the energy is moderate (682). The wave height is 6 ft on Monday, but the conditions are just not cooperating. The same story repeats Tuesday through to the end of the week, with smaller 2 ft to 5 ft swells, but the wind stays up and the surf quality suffers. It’s all cross-off or cross-shore wind, and the forecast is calling it poor or marginal. The energy levels drop into the low-to-mid hundreds (260 to 574), and the period jumps around, but nothing clicks. Honestly, it’s a bit of a downer. We’ve got a gap of poor-to-marginal surf from Monday the 13th all the way through to the end of the first week.
The second week doesn’t get much better. From July 20th to the 22nd, we’re still seeing clean cross-off winds, but the swell is small and the energy is moderate (333 to 523). The wave heights are up and down, but the surf quality remains poor or marginal. The swell direction is mixed between ENE and S, but the period is short, so no real power behind it.
There is a glimmer, though. Look at the end of the forecast period, around July 28th. We’ve got a pulse of long-period swell arriving. The height jumps to 6 ft, the period stretches to 14 seconds, and the combined energy spikes to 1563 (strong). That’s the kind of groundswell that knows what it’s doing. The wind is still cross-off, but that’s actually a good thing here. The wave comment is still "marginal" but the score is a bit higher. This is the standout in the whole run. The swell direction is ENE, and the optimum direction for this break is SSE, so it’s not a perfect match, but the size and period are there. It’s a promising call for the 28th, but remember, it’s a long way out, so keep your fingers crossed.
For a break like Number Fours, which is a bit more exposed, this long-period swell will be the one to watch. Given the reef setup, it might handle the direction better than a beach break. The crowds can be *sometimes* a factor here, so if this one comes off, you’ll want to be early.
Until then, it’s a waiting game. The surf is poor, the wind is up, and the quality is just not there. It’s a blank run of about two weeks before we see a real chance. Don’t give up hope, though – the last few days of the window are the ones to circle on the calendar.
Rusty.
Short Range ForecastLight rain (total 9mm), mostly falling on Tue morning. Warm (max 25°C on Mon morning, min 24°C on Mon morning). Winds decreasing (fresh winds from the ENE on Mon morning, light winds from the ENE by Wed night). | Days 4-6 Weather SummarySome drizzle, heaviest during Thu morning. Warm (max 26°C on Thu afternoon, min 24°C on Thu night). Mainly fresh winds. | ||||||||||||||||||||
Monday 13 | Tuesday 14 | Wednesday 15 | Thursday 16 | Friday 17 | Saturday 18 | Sunday 19 | |||||||||||||||
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) | ENE 8 | SSW 15 | ENE 7 | SW 14 | SW 14 | SSW 13 | SW 13 | SW 14 | SSW 16 | SSW 16 | SSW 17 | SSW 14 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | E 8 | E 8 | ENE 8 | E 7 |
Wave Graph | |||||||||||||||||||||
368 | 277 | 234 | 191 | 186 | 111 | 162 | 206 | 314 | 175 | 197 | 183 | 204 | 198 | 200 | 293 | 187 | 212 | 316 | 176 | 266 | |
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 | cross | 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 |
High Tide | 3:56PM0.82m | 3:49AM0.19m | 4:39PM0.80m | 4:45AM0.22m | 5:20PM0.76m | 5:41AM0.26m | 5:59PM0.69m | 6:41AM0.30m | 6:36PM0.61m | 7:44AM0.34m | 7:11PM0.52m | 8:53AM0.38m | 7:45PM0.43m | ||||||||
Low Tide | 8:13AM-0.09m | 11:23PM0.02m | 9:06AM-0.08m | 11:59PM0.01m | 9:57AM-0.04m | 00:34AM0.01m | 10:49AM0.01m | 1:08AM0.01m | 11:44AM0.08m | 1:42AM0.01m | 12:46PM0.16m | 2:15AM0.02m | 2:03PM0.22m | 2:48AM0.03m | |||||||
5:56 | — | — | 5:56 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | 5:58 | — | — | |
— | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | — | 7:15 | — | |
mm | — | — | — | 1 | 1 | 1 | 2 | 2 | 2 | 1 | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 24 | 25 | 25 | 24 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 25 | 25 | 24 |
Feels °C | 22 | 22 | 23 | 25 | 24 | 23 | 25 | 26 | 25 | 25 | 26 | 24 | 23 | 24 | 24 | 23 | 24 | 23 | 24 | 22 | 22 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SW 14 | SW 14 | E 8 | NE 8 | NE 7 | ENE 7 | SSW 16 | W 14 | ENE 6 | SSW 14 | W 14 | SSW 16 | SSW 14 | SSW 10 | ENE 7 | S 14 | S 12 | ESE 7 | SSW 11 |
287 | 272 | 208 | 191 | 74 | 141 | 132 | 101 | 314 | 203 | 104 | 183 | 144 | 196 | 160 | 57 | 187 | 146 | 72 | 75 | 73 | |
Swell 2 Height (m) Direction Period (s) | SSE 12 | W 18 | W 18 | W 16 | SW 14 | W 15 | W 15 | W 15 | W 15 | NNE 8 | W 14 | W 14 | SSW 16 | W 14 | NNE 7 | S 14 | S 14 | NNE 8 | NNE 8 | S 13 | S 18 |
27 | 97 | 152 | 190 | 186 | 227 | 221 | 215 | 212 | 44 | 203 | 148 | 100 | 98 | 29 | 94 | 148 | 34 | 23 | 82 | 97 | |
Swell 3 Height (m) Direction Period (s) | W 12 | SSE 11 | SW 18 | SSW 19 | W 16 | SSW 13 | SW 13 | SW 14 | SSE 8 | SSW 16 | SSW 17 | SSE 7 | SSW 12 | SSW 12 | W 13 | WNW 13 | SSW 9 | SSW 8 | S 19 | NNE 8 | NE 8 |
26 | 25 | 82 | 146 | 188 | 111 | 162 | 206 | 14 | 175 | 197 | 10 | 55 | 55 | 90 | 57 | 47 | 14 | 66 | 23 | 17 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 7 | NE 8 | NE 7 | — | — | — | NE 7 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | E 7 | ENE 7 | ENE 7 | E 8 | E 8 | ENE 8 | E 7 |
368 | 277 | 234 | 229 | 122 | — | — | — | 156 | 107 | 60 | 170 | 204 | 198 | 200 | 293 | 129 | 212 | 316 | 176 | 266 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 31 | 33 | 1 | 1 | 1 | 13 | 31 | 1 | 1 | 31 | 39 | 31 | 31 | 32 | 31 | 32 | 39 | 34 | 31 | 31 | 2 |
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.










