Using Surf-Forecast’s Historical Surf Data To Find The Most Consistent Waves On Earth
Using our statistical data for 7000 spots dating back to 2006, we can find those waves that break the most, with the best winds.
Surf Forecasts:
Blacks Reef surfForecast / Gisborne and Mahia / New Zealand
48hr Weather and Surf, issued 12 pm Thursday 18 Dec 2025 NZDTForecast update in hr min s Forecast update imminent
Blacks Reef surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Blacks Reef sea temperature is
18.5° C
(Which is 1.3°C warmer than normal for this time of year)How big are the waves at Blacks Reef today?
The current surf forecast for Blacks Reef at 4PM is: 1.6m 10s primary swell from a South direction and 0.1m 15s secondary swell from a South direction (forecast issued at 12:00pm December 18). An open ocean swell of 0.8m 8s is not directed at the surf break. The wind direction is predicted to be cross-offshore and the swell rating is 2.
| Time (NZDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (18 Dec) | 6ft (1.8m) | 10s |
| Afternoon (18 Dec) | 5ft (1.6m) | 10s |
| Evening (18 Dec) | 4.5ft (1.4m) | 9s |
Table - waves today at Blacks Reef. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||||||
| 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 7 | 7 | 8 | 8 | 8 | 9 | 6 | 6 | 11 | 10 | 10 | 10 | 9 | 9 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 640 | 561 | 460 | 332 | 269 | 215 | 137 | 107 | 76 | 72 | 39 | 26 | 46 | 45 | 44 | 9 | 55 | 130 | 153 | 551 | 500 | 377 | 293 | 424 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross | cross- off | cross- off | cross- off | cross | cross | cross- off | glass | cross- off | glass | cross- on | cross | cross | cross- off | cross- on | on | on | cross- on | cross- on | glass | cross- on | cross- on | cross- on |
High Tide / height (m) | 5:33PM 1.52 | 6:01AM 1.61 | 6:16PM 1.52 | 6:45AM 1.62 | 6:59PM 1.51 | |||||||||||||||||||
Low Tide / height (m) | 11:32AM 0.52 | 11:48PM 0.52 | 12:15PM 0.52 | 12:32AM 0.51 | 12:58PM 0.51 | 1:13AM 0.48 | ||||||||||||||||||
Thursday 18 | Friday 19 | Saturday 20 | Sunday 21 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:37 |
| Sunset | - | - | - | 8:31 | - | - | - | - | - | - | - | 8:31 | - | - | - | - | - | - | - | 8:32 | - | - | - | - |
 |  |  | |  | | | | | | | |  | |  | | | | | | |  | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 1 | - | - |
| Temp. °C | 17 | 18 | 19 | 19 | 17 | 16 | 14 | 15 | 19 | 22 | 23 | 21 | 19 | 18 | 18 | 18 | 17 | 18 | 17 | 15 | 13 | 14 | 12 | 13 |
| Feels °C (?) | 15 | 15 | 16 | 16 | 15 | 13 | 11 | 13 | 18 | 19 | 23 | 20 | 15 | 14 | 14 | 15 | 13 | 13 | 13 | 13 | 12 | 12 | 8 | 11 |
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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