
Surf Forecasts:
Blacks Reef surf forecast from 16 Jul 2026:
- Best quality surf: Saturday 18 Jul, 6PM (local time) - 7ft (2.1m), 23s period, S swell with glassy winds.
- Most powerful swell: Monday 20 Jul, 9PM (local time) - 8ft (2.5m), 19s period, S swell with 4,835 kJ wave energy.
- Next surfable swell (1★+): Friday 17 Jul, 9AM (local time) - 5ft (1.6m), 16s period with SE 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 (Jul 17) at 9AM. The primary swell is predicted to be 1.6m and 16s period with a secondary swell of 0.7m and 7s. 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 2.5m 19s and forecast to arrive on Monday (Jul 20) at 9PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 3s period and expected on Wednesday (Jul 22) at 3AM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 9AM (Fri 17th Jul) | 5ft (1.6m) 16s |
| Best Surf | 6PM (Sat 18th Jul) | 7ft (2.1m) 23s |
| Most Powerful | 9PM (Mon 20th Jul) | 8ft (2.5m) 19s |
Table - best surf conditions forecast for Blacks Reef over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s get into it.
We’ve got a solid run of south swell heading our way, but this isn’t one for the faint-hearted. The standout window is this Friday the 17th and into the weekend, with a hefty groundswell pushing in. Blacks Reef is the main player here, and it’s looking like a jetty for experienced surfers only.
Friday morning on the 17th is the pick of the bunch. We’re looking at a 5ft SE groundswell with a very long 16-second period, and it’s glassy. The water temperature is about average for the time of year, nothing unusual. The combined energy is strong at 1445, and with that glassy wind, the reef will be offering up some clean, powerful lines. It’s a bit big for beginners, but for the crew that knows what they’re doing, it’s going to be firing. Crowds are often here, so expect company.
Friday afternoon stays clean with a cross-off breeze, and the swell bumps up to 6ft, still with that long 16-second period. Energy jumps to 1854. This is still excellent, expert-only territory.
Saturday the 18th is a step down in quality. The wind goes cross-shore in the morning, and while the swell is still 5ft from the SE, the period drops to 14 seconds. The combined energy is still moderate at 1431, but the wind is just not as clean. The afternoon brings a weird shift: a 4ft S swell with a super long 24-second period and onshore wind. That long period at a reef can be a bit tricky, and the wind is ruining it. This one’s a pass.
Sunday the 19th sees the swell build again – 7ft from the S with an 18-second period in the morning. That’s a lot of water moving, with combined energy hitting 3239. But it’s a cross-on wind, so it’ll be a bit lumpy. Definitely only for experts, and the wind is a buzzkill. Afternoon is similar but smaller.
Monday the 20th and Tuesday the 21st are a mixed bag. Monday is cross-on and the swell is dropping. Monday morning is 6ft S (1616 energy), but that wind is a nuisance. Tuesday morning is bigger at 8ft S (2907 energy), but it’s raining and cross-shore. The real bright spot on Tuesday is the afternoon: the wind goes glassy, the swell is 7ft S (2097 energy), and the conditions are excellent. That’s a solid session for the experienced.
After Tuesday, things drop off. Wednesday the 22nd is much smaller, with weak energy in the 500s and 300s, and the wind is either cross-on or onshore. Not worth paddling out. Thursday and Friday are tiny, with energy barely cracking 100. Small, clean but very ordinary.
The following week from the 25th of July onward is a letdown. The swell is small and inconsistent. There’s a brief moment on Saturday the 25th afternoon with a 3ft SE swell, a 17-second period, and clean cross-off wind – that’s the best of a weak bunch. The energy is 352, which is weak. The 26th Sunday afternoon has glassy conditions with a 3ft SE swell, but it’s still small. The rest of that week is a write-off: onshore winds, rain, and tiny, weak surf. The 27th Monday is a mess with strong onshore winds and poor surf.
The best of the best is Friday the 17th morning. That’s your session. After that, Tuesday the 21st afternoon is the next real standout. The rest is for the die-hards or the kite surfers when the wind is up and the waves are messy.
Stay safe out there.
Rusty.
Short Range ForecastMostly dry. Very mild (max 12°C on Fri morning, min 8°C on Fri night). Wind will be generally light. | Days 4-6 Weather SummaryModerate rain (total 14mm), heaviest on Mon afternoon. Very mild (max 13°C on Wed morning, min 9°C on Mon afternoon). Wind will be generally light. | ||||||||||||||||||||
Friday 17 | Saturday 18 | Sunday 19 | Monday 20 | Tuesday 21 | Wednesday 22 | Thursday 23 | |||||||||||||||
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) | SE 16 | SE 16 | SE 15 | SE 14 | S 24 | S 20 | S 18 | S 17 | S 16 | S 15 | S 15 | S 19 | S 17 | S 16 | S 14 | S 12 | S 12 | S 11 | S 11 | S 11 | S 10 |
Wave Graph | |||||||||||||||||||||
1350 | 1267 | 1171 | 992 | 1344 | 4264 | 2827 | 2142 | 1452 | 1466 | 1212 | 4586 | 3702 | 2529 | 1313 | 678 | 477 | 416 | 332 | 326 | 158 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | glassy | cross-off | off | cross | on | cross | cross | on | cross-off | glassy | glassy | cross-on | glassy | cross-off | cross-off | cross | on | cross | glassy | cross-off | cross-off |
High Tide | 8:06PM1.93m | 8:36AM1.77m | 8:58PM1.88m | 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 | ||||||||
Low Tide | 1:47PM0.03m | 2:28AM0.06m | 2:42PM0.06m | 3:21AM0.09m | 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 | ||||||||
7:22 | — | — | 7:22 | — | — | 7:22 | — | — | 7:20 | — | — | 7:20 | — | — | 7:20 | — | — | 7:18 | — | — | |
— | 5:06 | — | — | 5:07 | — | — | 5:07 | — | — | 5:07 | — | — | 5:08 | — | — | 5:09 | — | — | 5:10 | — | |
mm | — | — | — | — | — | — | — | — | — | 3 | 6 | 4 | 1 | — | — | — | — | — | — | — | — |
Temp °C | 12 | 12 | 10 | 11 | 12 | 11 | 12 | 11 | 10 | 11 | 10 | 10 | 11 | 12 | 11 | 13 | 13 | 10 | 13 | 13 | 12 |
Feels °C | 11 | 10 | 7 | 8 | 10 | 9 | 9 | 8 | 8 | 10 | 9 | 9 | 10 | 10 | 7 | 9 | 10 | 8 | 11 | 11 | 8 |
Swell 1 Height (m) Direction Period (s) | SE 16 | SE 16 | SE 15 | SE 14 | SE 14 | S 20 | S 18 | S 17 | S 16 | S 15 | S 15 | S 19 | S 17 | S 16 | S 14 | S 12 | S 12 | S 11 | S 11 | S 11 | S 10 |
1350 | 1267 | 1171 | 992 | 765 | 4264 | 2827 | 2142 | 1452 | 1466 | 1212 | 4586 | 3702 | 2529 | 1313 | 678 | 477 | 416 | 332 | 326 | 158 | |
Swell 2 Height (m) Direction Period (s) | S 7 | S 10 | S 10 | S 12 | S 24 | SE 13 | SE 13 | SE 13 | SE 12 | SE 12 | S 19 | SE 11 | SE 11 | SE 11 | E 11 | SE 11 | SE 10 | SE 12 | SSW 11 | S 10 | SSW 10 |
48 | 314 | 271 | 409 | 1344 | 637 | 437 | 363 | 244 | 169 | 598 | 103 | 59 | 60 | 59 | 29 | 28 | 22 | 43 | 54 | 32 | |
Swell 3 Height (m) Direction Period (s) | SSW 16 | S 18 | S 15 | S 20 | S 11 | — | — | — | S 20 | — | SE 12 | — | — | — | — | E 15 | E 14 | SE 12 | SE 11 | ESE 11 | NNE 3 |
47 | 174 | 212 | 30 | 242 | — | — | — | 119 | — | 164 | — | — | — | — | 4 | 4 | 37 | 20 | 12 | 1 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | N 3 | NW 3 | W 3 | S 6 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 | 2 | 2 | 56 | — | — | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 0 | 3 | 3 | 3 | 3 | 3 | 0 | 0 | 0 | 3 | 0 | 0 | 0 | 3 | 3 | 3 | 0 | 0 | 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.










