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Surf Forecasts:
Sponge bay surfForecast / Gisborne and Mahia / New Zealand
48hr Weather and Surf, issued 12 pm Wednesday 17 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
18.5° C
(Which is 1.1°C warmer than normal for this time of year)How big are the waves at Sponge bay today?
The current surf forecast for Sponge bay at 2PM is: 0.3m 5s primary swell from a South direction (forecast issued at 12:00pm December 17). An open ocean swell of 0.4m 7s is not directed at the surf break. The wind direction is predicted to be cross-onshore.
| Time (NZDT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Dec) | 0.5ft (0.2m) | 10s |
| Afternoon (17 Dec) | 1ft (0.3m) | 5s |
| Evening (17 Dec) | 2.5ft (0.7m) | 6s |
Table - waves today at Sponge bay. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| 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 | 5 | 6 | 5 | 6 | 7 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 | 8 | 7 | 7 | 8 | 8 | 8 |
Wave (?)Graph  | ||||||||||||||||||||||||
 kJ (?) | 10 | 5 | 5 | 15 | 48 | 121 | 373 | 177 | 197 | 188 | 154 | 140 | 116 | 121 | 94 | 88 | 65 | 37 | 35 | 18 | 10 | 19 | 20 | 20 |
Wind (km/h) | ||||||||||||||||||||||||
| Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy | cross | cross- on | cross- on | cross- on | cross- on | cross | cross- off | cross- off | glass | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross- off | cross | cross- off | cross | cross- off | cross- off | cross- off | cross- off |
High Tide / height (m) | 4:43PM 1.78 | 5:13AM 1.77 | 5:26PM 1.73 | 5:58AM 1.74 | 6:10PM 1.69 | 6:47AM 1.72 | ||||||||||||||||||
Low Tide / height (m) | 10:41AM 0.73 | 10:58PM 0.63 | 11:23AM 0.75 | 11:41PM 0.65 | 12:09PM 0.77 | 12:26AM 0.66 | ||||||||||||||||||
Wednesday 17 | Thursday 18 | Friday 19 | Saturday 20 | |||||||||||||||||||||
| Sunrise | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:37 | - | - | - | - | - | - | - | 5:37 |
| Sunset | - | - | - | 8:29 | - | - | - | - | - | - | - | 8:29 | - | - | - | - | - | - | - | 8:30 | - | - | - | - |
 |  |  |  |  |  |  |  | | | | | | | | | | | | |  | | | | |
Rain (mm) | - | - | 2 | 1 | 1 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
| Temp. °C | 18 | 17 | 15 | 15 | 13 | 12 | 11 | 11 | 16 | 17 | 18 | 19 | 18 | 16 | 14 | 14 | 19 | 21 | 22 | 23 | 20 | 19 | 18 | 18 |
| Feels °C (?) | 16 | 11 | 13 | 12 | 10 | 10 | 9 | 8 | 15 | 13 | 13 | 17 | 14 | 12 | 10 | 11 | 16 | 20 | 20 | 21 | 15 | 15 | 14 | 15 |
- Map Icons:
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Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
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