Tahunanui bar Surf Forecast

/ Nelson – Tasman Bay (18 surf breaks) /

New Zealand (466 surf breaks) / Lat Long: (41.26° S 173.24° E)

Surf Forecasts:

Tahunanui bar surfForecast / Nelson – Tasman Bay / New Zealand

12 Day Weather and Surf, issued 11 am Thursday 18 Sep 2025 NZST

Forecast update in hr min s Forecast update imminent

Tahunanui bar surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Tahunanui bar sea temperature is 13.3° C
(Which is slightly warmer than usual)

Best Forecast Surf Conditions for Tahunanui bar this week:

The surf forecast for Tahunanui bar over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 9PM. The primary swell is predicted to be 0.8m and 8s period with a secondary swell of 0.3m and 11s. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Tahunanui bar in the next 12 days are 3.5m 11s and forecast to arrive on Sunday (Sep 21) 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 0.7m 6s period and expected on Thursday (Sep 25) at 6PM.

Wave Type	Time (NZST) & Date	Wave Height & Period
Next good surf (1 star+)	9PM (Thu 18th Sep)	2.5ft (0.8m) 8s
Best Surf	12AM (Mon 22nd Sep)	6ft (1.8m) 10s
Most Powerful	9PM (Sun 21st Sep)	11ft (3.5m) 11s

Table - best surf conditions forecast for Tahunanui bar over the next 12 days.

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Short Range Forecast Light rain (total 3mm), mostly falling on Thu night. Very mild (max 15°C on Thu morning, min 5°C on Fri night). Winds increasing (calm on Fri morning, fresh winds from the NNW by Sat night).									Days 3-6 Weather Summary Heavy rain (total 37mm), heaviest during Sun afternoon. Very mild (max 15°C on Mon morning, min 6°C on Mon night). Mainly strong winds.
	Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night	AM	PM	Night
Rating (10 max)	1	0	1	1	0	0	0	0	0	0	0	3	2	0	1	1	1	1	0	0	0
Swell Height Map See all maps
Wave Height (m) & direction (?)	N	N	N	N	NNW	NNW	NNW	NNW	N	N	N	N	N	N	N	N	NNW	N	N	N	NNW
Period(s) (?)	8	8	8	8	14	13	7	4	5	8	10	10	10	9	8	8	8	7	7	4	4
Wave Graph (?)
kJ (?)	196	169	63	30	36	17	4	15	55	453	1697	640	307	235	173	111	215	40	17	6	7
Wind (km/h)	WSW	W	SW	NE	N	N	W	N	NNW	N	N	NW	W	NE	SSW	W	NNE	S	W	NNE	SSE
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	cross- off	cross- off	cross- off	glass	on	glass	glass	on	cross- on	on	on	glass	glass	cross- on	off	cross- off	cross- on	glass	glass	cross- on	off
High Tide / height (m)			7:51PM 3.54	7:57AM 3.42		8:34PM 3.78	8:44AM 3.64		9:10PM 3.96	9:24AM 3.83		9:44PM 4.07	10:00AM 3.96		10:15PM 4.13	10:33AM 4.03		10:46PM 4.12	11:06AM 4.05		11:16PM 4.05
Low Tide / height (m)		1:16PM 1.37	1:52AM 1.03		2:15PM 1.13	2:35AM 0.82		2:58PM 0.90		3:12AM 0.67	3:33PM 0.72		3:46AM 0.58	4:03PM 0.60		4:17AM 0.55	4:31PM 0.57		4:48AM 0.57	4:58PM 0.62

	Thursday 18			Friday 19			Saturday 20			Sunday 21			Monday 22			Tuesday 23			Wednesday 24
Sunrise	6:24	-	-	6:22	-	-	6:20	-	-	6:18	-	-	6:16	-	-	6:15	-	-	6:13	-	-
Sunset	-	6:19	-	-	6:20	-	-	6:21	-	-	6:22	-	-	6:22	-	-	6:23	-	-	6:24	-

Rain (mm)	-	-	1	1	-	-	-	-	1	6	21	10	-	-	-	-	-	-	-	-	-
Temp. °C	15	15	9	9	10	9	10	12	12	13	13	14	15	15	9	12	13	10	13	13	10
Feels °C (?)	10	10	6	6	6	6	7	7	6	5	6	10	14	12	6	9	10	8	10	10	8

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Nelson - Tasman Bay

Wind Update The wind is still offshore at Tahunanui bar (light winds from the SSW at NelsonAeroAws 5 km from Tahunanui bar). 1.1m 9s swell from the NNW with a 0.4m 12s groundswell, also from the NNW. 2 swells combining to make bigger set waves.
1 hour 29 minutes ago Tahunanui bar

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1 h 29 min ago

19 km/h

SSW

Offshore

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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Tahunanui bar surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

Information about the Tahunanui bar Surf forecast

The above surf forecast table for Tahunanui bar provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Tahunanui bar can be found by selecting the local surf guide option on the grey menu. Our Tahunanui bar 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 (Tahunanui bar) 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 Tahunanui bar 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.