
Surf Forecasts:
Blacks Reef surf forecast from 18 Jul 2026:
- Best quality surf: Tuesday 21 Jul, 6PM (local time) - 6ft (1.9m), 14s period, S swell with cross-offshore winds.
- Most powerful swell: Monday 20 Jul, 9PM (local time) - 10ft (3.0m), 19s period, S swell with 5,498 kJ wave energy.
- Next surfable swell (1★+): Tuesday 21 Jul, 6PM (local time) - 6ft (1.9m), 14s period with S swell.
Best Forecast Surf Conditions for Blacks Reef this week:
The surf forecast for Blacks Reef over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 21) at 6PM. The primary swell is predicted to be 1.9m and 14s period with a secondary swell of 0.5m and 11s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Blacks Reef in the next 16 days are 3.0m 19s and forecast to arrive on Monday (Jul 20) at 9PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 4s period and expected on Thursday (Jul 23) at 6PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 6PM (Tue 21st Jul) | 6ft (1.9m) 14s |
| Best Surf | 6PM (Tue 21st Jul) | 6ft (1.9m) 14s |
| Most Powerful | 9PM (Mon 20th Jul) | 10ft (3.0m) 19s |
Table - best surf conditions forecast for Blacks Reef over the next 16 days.
The Lowdown
G'day, Rusty here. Alright, let’s look at what’s shaping up over the next couple of weeks. We’ve got some solid swell coming, but you’ve gotta be patient and pick your spots. The water is sitting at 55°, which is a bit colder than usual for this time of year, so you’ll want a thicker wetsuit.
The first real action kicks off on Sunday the 19th of July. Blacks Reef is the only spot on the menu, and it’s a reliable reef break that’s exposed to the south. Sunday morning we’ve got a solid 7ft southerly groundswell with a very long 18-second period, pumping a ton of energy into the water (3284). It’s a big one, but the wind is light and cross-onshore, so it’s gonna be a little bumpy. Still, for a bigger wave, it’s a decent start. That afternoon, the wind swings onshore and gets stronger, so it’s a write-off.
Monday the 20th sees the swell drop a bit to 6ft, but the period is still a nice 15 seconds. The wind is onshore again, though, so it’s messy. The afternoon picks up to 8ft with a 19-second period (4132 energy), which is huge, but again, the wind is onshore, making it a fight. Not the best.
Tuesday the 21st is similar – 8ft southerly groundswell, 16-second period, but the wind is light and cross-onshore, so it’s not clean. A bit frustrating.
Now, here’s where it gets interesting. Wednesday morning the 22nd of July, the swell drops to a more manageable 4ft, but the period is a solid 12 seconds. The key here is the wind – it’s glassy. Dead calm. That’s a major positive. The waves will be clean as a whistle, but it’s a bit smaller. The energy is moderate (540). It’s a good little session for the beginners, but it’s not the standout.
The real standout is looking like Friday the 31st of July. The morning session has a solid 10ft southerly groundswell with a 13-second period, and the energy is strong (3022). The wind is a light cross-offshore from the NNW, which is perfect for a reef break like this – it’s going to be clean and hollow. This is for experienced surfers only, as it’s over 8ft. The afternoon drops to 8ft, still clean, and still a good option for the crew who know what they’re doing. Crowds are likely here, so get out early.
The following Monday, the 3rd of August, also looks promising. Morning has a 7ft southerly swell with an 11-second period, and the wind is offshore from the north. That’s a solid, clean, expert-level wave. The energy is strong (1268). The afternoon is a bit smaller at 6ft, but still clean and a good option for the advanced crew.
Outside of those windows, there are a lot of days with poor conditions – strong winds, onshore slop, or just tiny waves. We’ve got a gap from the 22nd afternoon all the way through to the 30th with no real recommendations, so that’s a long stretch of flat or messy water. The 30th actually has a huge 12ft to 13ft southerly swell, but it’s being hammered by a fresh onshore wind, so that’s a total write-off – more of a kite-surfing day than a surfing day.
So, to sum it up: the best of the best is Friday the 31st of July – big, clean, and powerful. The 3rd of August is a solid backup. Everything else is either too small, too windy, or both. Keep your eyes on the forecast, but for now, that’s the call.
Rusty.
Short Range ForecastLight rain (total 4mm), mostly falling on Sun night. Very mild (max 13°C on Sun morning, min 8°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 3mm), mostly falling on Fri night. Very mild (max 14°C on Thu afternoon, min 7°C on Wed night). Winds increasing (calm on Wed morning, fresh winds from the WNW by Fri night). | ||||||||||||||||||||
Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | Friday 24 | Saturday 25 | |||||||||||||||
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) | S 18 | S 17 | S 16 | S 15 | S 19 | S 18 | S 16 | S 15 | S 13 | S 12 | S 12 | S 12 | S 13 | S 12 | SSE 11 | S 10 | E 8 | SW 4 | E 10 | SE 16 | SW 7 |
Wave Graph | |||||||||||||||||||||
2796 | 1903 | 1452 | 1415 | 3791 | 4638 | 2594 | 1722 | 905 | 501 | 336 | 268 | 268 | 78 | 39 | 31 | 32 | 39 | 78 | 93 | 595 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-off | glassy | glassy | cross-off | off | off | cross-off | cross-off | cross-off | cross | cross | cross-off | cross-on |
High Tide | 9:27AM1.75m | 9:50PM1.81m | 10:17AM1.72m | 10:42PM1.74m | 11:07AM1.68m | 11:33PM1.68m | 11:59AM1.65m | 00:24AM1.62m | 12:54PM1.62m | 1:14AM1.58m | 1:46PM1.61m | 2:03AM1.55m | 2:36PM1.59m | 2:51AM1.51m | |||||||
Low Tide | 3:36PM0.13m | 4:12AM0.14m | 4:30PM0.21m | 5:02AM0.20m | 5:23PM0.29m | 5:51AM0.28m | 6:15PM0.36m | 6:39AM0.36m | 7:08PM0.42m | 7:27AM0.42m | 8:00PM0.47m | 8:15AM0.47m | 8:50PM0.50m | ||||||||
7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | 7:18 | — | — | 7:18 | — | — | |
— | 5:07 | — | — | 5:07 | — | — | 5:08 | — | — | 5:09 | — | — | 5:10 | — | — | 5:10 | — | — | 5:12 | — | |
mm | — | — | 2 | — | — | 2 | — | — | — | — | — | — | — | — | — | — | — | 3 | — | — | — |
Temp °C | 13 | 13 | 12 | 11 | 11 | 10 | 10 | 11 | 9 | 11 | 11 | 9 | 12 | 14 | 11 | 14 | 14 | 10 | 13 | 15 | 12 |
Feels °C | 9 | 9 | 8 | 8 | 7 | 7 | 8 | 9 | 6 | 9 | 9 | 6 | 9 | 10 | 7 | 9 | 10 | 4 | 7 | 10 | 5 |
Swell 1 Height (m) Direction Period (s) | S 18 | S 17 | S 16 | S 15 | S 19 | S 18 | S 16 | S 15 | S 13 | S 12 | S 12 | S 12 | S 13 | S 11 | ENE 7 | S 10 | E 8 | E 7 | E 10 | E 10 | SE 15 |
2796 | 1903 | 1452 | 1415 | 3791 | 4638 | 2594 | 1722 | 905 | 501 | 336 | 268 | 268 | 61 | 18 | 31 | 32 | 9 | 78 | 66 | 218 | |
Swell 2 Height (m) Direction Period (s) | SE 13 | SE 13 | SE 12 | SE 12 | SE 12 | SE 11 | SE 11 | SE 11 | SE 11 | SE 10 | SE 11 | SE 10 | SE 11 | S 12 | SSE 11 | ENE 7 | S 9 | E 9 | SSW 5 | SE 16 | E 9 |
488 | 363 | 244 | 169 | 167 | 130 | 97 | 99 | 56 | 39 | 29 | 27 | 30 | 78 | 39 | 9 | 27 | 14 | 14 | 93 | 28 | |
Swell 3 Height (m) Direction Period (s) | — | — | — | S 19 | ESE 12 | — | — | — | — | — | E 4 | ESE 12 | S 12 | SE 11 | SSW 10 | SE 10 | SE 11 | S 9 | S 8 | S 6 | SSW 16 |
— | — | — | 434 | 174 | — | — | — | — | — | 1 | 15 | 3 | 30 | 35 | 16 | 18 | 14 | 12 | 6 | 26 | |
Wind waves Height (m) Direction Period (s) | — | SSW 4 | S 6 | — | — | — | — | — | — | — | — | — | NE 4 | ENE 3 | NNW 2 | N 3 | NNE 4 | SW 4 | NW 2 | NW 3 | SW 7 |
— | 25 | 75 | — | — | — | — | — | — | — | — | — | 1 | 3 | 1 | 4 | 5 | 39 | 1 | 5 | 595 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 3 | 91 | 14 | 3 | 3 | 6 | 3 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 55 | 45 | 9 | 3 | 33 | 3 |
Best forecast wave conditions in Gisborne and Mahia | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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Information about the Blacks Reef Surf forecast
The above surf forecast table for Blacks Reef provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Blacks Reef can be found by selecting the local surf guide option on the grey menu. Our Blacks Reef 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 (Blacks Reef) 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 Blacks Reef 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.
Blacks Reef is 50 km (31 miles) from the city of Gisborne. If you plan a holiday in Gisborne and Mahia, look for hotels and other accommodation in Gisborne. Gisborne has rooms for a wide range of budgets as well as car hire and transport links.










