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:
Sponge bay surfForecast / Gisborne and Mahia / New Zealand
48hr Weather and Surf, issued 6 am Saturday 20 Dec 2025 NZDTForecast update in hr min s Forecast update imminent
Sponge bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Sponge bay sea temperature is
18.3° C
(Which is slightly warmer than usual)How big are the waves at Sponge bay today?
The current surf forecast for Sponge bay at 10AM is: 0.5m 6s primary swell from a South direction and 0.3m 8s secondary swell from a East direction (forecast issued at 06:00am December 20). The wind direction is predicted to be cross-onshore.
| Time (NZDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Dec) | 1.5ft (0.5m) | 6s |
| Afternoon (20 Dec) | 4ft (1.2m) | 7s |
| Evening (20 Dec) | 3.5ft (1.0m) | 9s |
Table - waves today at Sponge bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Saturday 20 | Sunday 21 | Monday 22 | Tue 23 | |||||||||||||||||||||
| 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 | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | |
Rating (10 max) | ||||||||||||||||||||||||
Swell Height Map |    |    |    |    | ||||||||||||||||||||
| Wave Height (m) & direction (?) | ||||||||||||||||||||||||
| Period(s) (?) | 8 | 8 | 6 | 7 | 6 | 9 | 9 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 20 | 20 | 21 | 139 | 64 | 98 | 168 | 172 | 164 | 116 | 311 | 68 | 140 | 121 | 116 | 111 | 124 | 133 | 133 | 130 | 94 | 96 | 100 | 127 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross- off | cross- off | cross- on | cross- on | cross- on | cross | glass | cross- off | cross | cross- off | cross- on | cross- on | cross- on | cross | cross | cross- on | cross- off | off | cross | cross | cross- off | cross- off | off | cross- off |
High Tide / height (m) | 6:47AM 1.72 | 6:58PM 1.67 | 7:39AM 1.73 | 7:49PM 1.68 | 8:29AM 1.75 | 8:42PM 1.70 | ||||||||||||||||||
Low Tide / height (m) | 1:00PM 0.78 | 1:14AM 0.68 | 1:55PM 0.79 | 2:02AM 0.69 | 2:49PM 0.77 | |||||||||||||||||||
Saturday 20 | Sunday 21 | Monday 22 | Tue 23 | |||||||||||||||||||||
| Sunrise | - | 5:37 | - | - | - | - | - | - | - | 5:39 | - | - | - | - | - | - | - | 5:39 | - | - | - | - | - | - |
| Sunset | - | - | - | - | - | 8:30 | - | - | - | - | - | - | - | 8:30 | - | - | - | - | - | - | - | 8:31 | - | - |
 |  | | | | | | |  | | |  | | | |  | | | | | | | | | |
Rain (mm) | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 19 | 19 | 19 | 18 | 17 | 17 | 15 | 14 | 13 | 12 | 17 | 17 | 16 | 16 | 15 | 15 | 15 | 15 | 16 | 17 | 18 | 18 | 17 | 18 |
| Feels °C (?) | 15 | 15 | 16 | 13 | 13 | 14 | 14 | 13 | 10 | 9 | 12 | 11 | 12 | 13 | 12 | 13 | 13 | 14 | 14 | 13 | 15 | 16 | 16 | 15 |
- 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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