
Surf Forecasts:
Blacks Reef surf forecast from 5 Aug 2026:
- Best quality surf: Friday 7 Aug, 9AM (local time) - 4ft (1.2m), 17s period, S swell with glassy winds.
- Most powerful swell: Wednesday 5 Aug, 9PM (local time) - 11ft (3.5m), 12s period, S swell with 3,601 kJ wave energy.
- Next surfable swell (1★+): Friday 7 Aug, 9AM (local time) - 4ft (1.2m), 17s 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 Friday (Aug 07) at 9AM. The primary swell is predicted to be 1.2m and 17s period with a secondary swell of 1.8m and 10s. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Blacks Reef in the next 16 days are 3.5m 12s and forecast to arrive on Wednesday (Aug 05) 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 0.9m 5s period and expected on Wednesday (Aug 12) at 3PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 7th Aug) | 4ft (1.2m) 17s |
| Best Surf | 9AM (Fri 7th Aug) | 4ft (1.2m) 17s |
| Most Powerful | 9PM (Wed 5th Aug) | 11ft (3.5m) 12s |
Table - best surf conditions forecast for Blacks Reef over the next 16 days.
The Lowdown
G’day, Rusty here. Let’s cut through it and get you sorted for the next couple of weeks.
We’ve got a slow start, but there’s a proper window of clean, rippable surf coming up around Friday the 7th, and then it looks like it’s going to get big and angry for a stretch after that. The early part of the week is a write-off, so don’t bother paddling out until we see the back of the wind.
Wednesday the 5th and Thursday the 6th are basically a no-go. We’re looking at strong south-west winds, rain, and messy, onshore conditions. Thursday afternoon does ease a bit, but the surf will still be lumpy and pretty average. Not worth the hassle.
The standout run kicks off Friday morning, the 7th. This is where it gets good. We’ve got a proper groundswell filling in from the south, with a long period of 17 seconds. The wind drops right out, going glassy, and the waves at Blacks Reef (Big Island) will be clean and lined up. It’s a beginner-friendly reef, but don’t let that fool you – with a 4ft swell at that long period, there’s plenty of push. The combined energy is a solid 1665, so there’s some real power in the water. The period is long enough to make paddling out a bit easier between sets, too. Friday afternoon stays clean with a 6ft swell and light cross-off breeze. This is your best bet for a quality session.
Saturday the 8th is still very good. The swell drops slightly to 7ft in the morning, still with a 12-second period, and it’s clean. It’s a little more size, but still manageable for most. The afternoon holds at 6ft. The energy is still moderate to strong.
Sunday the 9th sees the swell ease off. Morning is still fun at 4ft, but the afternoon drops to just under 3ft. The wind turns offshore in the afternoon, so there will be some clean, if smaller, waves to finish the weekend.
Monday the 10th through Thursday the 13th is a flat spell. The swell dies right down, and we’re left with dribbly, under-3ft junk. There are a few tiny, clean moments, but honestly, it’s not worth getting wet for. The energy values drop into double digits, which tells you everything you need to know.
Friday the 14th and Saturday the 15th are poor. Strong south-west winds return, the surf is tiny but messy, and the outlook is grim. Not a chance.
Then things get serious. Sunday the 16th is still a mess, but watch out for Monday the 17th and Tuesday the 18th. A solid pulse of south-west swell arrives. Monday afternoon sees 10ft on the face, and by Tuesday morning it’s pushing 12ft with a 13-second period and a huge energy reading of 3858. This is big, powerful surf. To be clear, this is expert-only territory. Anything over 8ft is just for the crew who know what they’re doing. The tide and wind might be okay, but the size is the issue here. For everyone else, this will be a washout. There’s also a chance that the long period and size will make it close out at the beach breaks, but at Blacks Reef, it might have a bit more shape. Still, this is for experts only.
The long-range looks promising again. Wednesday the 19th looks like the best of the second week’s swell, with a solid SSE groundswell of 7ft in the morning and clean conditions, dropping to 7ft in the afternoon with glassy winds. That’s a promising window, but it’s a week and a half out, so treat it as such.
One more thing – the water on Wednesday the 5th is 55°, which is a bit colder than average for this time of year. So suit up warm for the first surf break that’s worth it on Friday.
So, bottom line: Friday the 7th is your standout day, with Saturday the 8th a close second. The following Tuesday is for the daredevils only. The rest is either flat or blown out.
Catch you in the water.
Rusty.
Short Range ForecastLight rain (total 6mm), mostly falling on Wed afternoon. Very mild (max 12°C on Sat morning, min 4°C on Thu night). Winds decreasing (fresh winds from the SSW on Wed afternoon, calm by Fri morning). | Days 5-7 Weather SummaryLight rain (total 2mm), mostly falling on Sun night. Very mild (max 17°C on Mon afternoon, min 10°C on Sat night). Wind will be generally light. | |||||||||||||||||||
Wed 5 | Thursday 6 | Friday 7 | Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | ||||||||||||||
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 12 | S 12 | S 11 | S 11 | SSW 10 | S 17 | S 15 | S 13 | S 12 | S 12 | S 11 | S 11 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 9 | SSE 12 | SSE 11 | SSE 11 |
Wave Graph | ||||||||||||||||||||
4829 | 3213 | 2282 | 1423 | 551 | 802 | 1415 | 1537 | 1098 | 925 | 543 | 381 | 302 | 212 | 173 | 131 | 118 | 158 | 263 | 198 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | on | cross | glassy | cross-off | cross-off | glassy | cross-off | cross-off | cross-off | cross-off | off | cross-off | cross-off | on | glassy | cross-off | off |
High Tide | 10:51PM1.66m | 11:10AM1.67m | 11:41PM1.67m | 12:04PM1.70m | 00:33AM1.67m | 1:01PM1.74m | 1:29AM1.67m | 2:00PM1.77m | 2:29AM1.68m | 2:59PM1.81m | 3:29AM1.69m | 3:57PM1.84m | ||||||||
Low Tide | 4:38PM0.30m | 5:05AM0.28m | 5:29PM0.31m | 5:54AM0.28m | 6:23PM0.31m | 6:46AM0.27m | 7:22PM0.29m | 7:41AM0.25m | 8:22PM0.24m | 8:41AM0.22m | 9:21PM0.19m | 9:43AM0.16m | 10:20PM0.15m | |||||||
— | — | 7:05 | — | — | 7:05 | — | — | 7:03 | — | — | 7:03 | — | — | 7:01 | — | — | 7:01 | — | — | |
5:22 | — | — | 5:22 | — | — | 5:22 | — | — | 5:23 | — | — | 5:24 | — | — | 5:25 | — | — | 5:27 | — | |
mm | 2 | 4 | — | — | — | — | — | — | — | — | — | — | — | 1 | — | 1 | — | — | — | — |
Temp °C | 9 | 9 | 9 | 9 | 7 | 9 | 10 | 8 | 12 | 14 | 12 | 14 | 16 | 13 | 16 | 17 | 12 | 13 | 14 | 13 |
Feels °C | 0 | 2 | 3 | 3 | 3 | 7 | 7 | 6 | 9 | 10 | 8 | 10 | 13 | 10 | 13 | 16 | 11 | 11 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | — | SE 16 | S 11 | S 11 | SSE 10 | SSE 10 | S 15 | S 13 | S 12 | S 12 | S 11 | S 11 | S 10 | S 10 | SSE 10 | SSE 10 | SSE 9 | SSE 12 | SSE 11 | SSE 11 |
— | 41 | 1860 | 1423 | 411 | 680 | 1415 | 1537 | 1098 | 925 | 543 | 381 | 302 | 212 | 173 | 131 | 118 | 158 | 263 | 198 | |
Swell 2 Height (m) Direction Period (s) | — | — | SE 15 | NE 17 | S 10 | S 17 | S 10 | E 14 | ESE 12 | E 13 | SSE 15 | SSE 14 | S 14 | S 13 | NE 4 | NNE 7 | NE 6 | S 9 | S 15 | S 19 |
— | — | 56 | 12 | 353 | 802 | 520 | 4 | 14 | 3 | 46 | 210 | 236 | 89 | 3 | 4 | 8 | 76 | 4 | 7 | |
Swell 3 Height (m) Direction Period (s) | — | — | E 18 | NE 17 | SSE 12 | SE 13 | SE 12 | NE 14 | SE 11 | NE 13 | NE 13 | SSW 18 | E 12 | E 12 | NE 6 | S 16 | SE 13 | NE 6 | S 21 | S 13 |
— | — | 6 | 12 | 371 | 163 | 120 | 8 | 59 | 7 | 7 | 31 | 12 | 3 | 1 | 5 | 40 | 6 | 9 | 3 | |
Wind waves Height (m) Direction Period (s) | S 12 | S 12 | S 11 | SSW 11 | SSW 10 | — | — | — | — | — | NE 3 | N 3 | NNW 3 | NNE 4 | — | ENE 3 | SSE 3 | SE 3 | E 6 | NE 4 |
4829 | 3213 | 2282 | 1091 | 551 | — | — | — | — | — | 3 | 4 | 4 | 12 | — | 4 | 1 | 2 | 20 | 21 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 89 | 91 | 75 | 75 | 9 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 6 | 0 | 0 | 0 |
Best forecast wave conditions in Gisborne and Mahia | ||||||||||||||||||||
Best forecast wave conditions in New Zealand | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)
Latest Updates
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.











