Surf Forecasts:
Ruby Bay surf forecast from 9 Jul 2026:
- Best quality surf: Tuesday 14 Jul, 3AM (local time) - 6ft (1.8m), 7s period, N swell with offshore winds.
- Most powerful swell: Tuesday 14 Jul, 12AM (local time) - 6ft (1.9m), 7s period, N swell with 368 kJ wave energy.
- Next surfable swell (1★+): Tuesday 14 Jul, 3AM (local time) - 6ft (1.8m), 7s period with N swell.
Best Forecast Surf Conditions for Ruby Bay this week:
The surf forecast for Ruby Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Jul 14) at 3AM. The primary swell is predicted to be 1.8m and 7s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Ruby Bay in the next 16 days are 1.9m 7s and forecast to arrive on Tuesday (Jul 14) at 12AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.7m 7s period and expected on Tuesday (Jul 14) at 9PM.
| Wave Type | Time (NZST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 3AM (Tue 14th Jul) | 6ft (1.8m) 7s |
| Best Surf | 3AM (Tue 14th Jul) | 6ft (1.8m) 7s |
| Most Powerful | 12AM (Tue 14th Jul) | 6ft (1.9m) 7s |
Table - best surf conditions forecast for Ruby Bay over the next 16 days.
Alright, let’s break down the next couple of weeks for Ruby Bay.
Honestly, it’s a quiet stretch. Ruby Bay is a sheltered little point that rarely breaks, and that’s exactly what we’re looking at. The first week is basically flat. A few tiny pulses of 0.3ft to 2ft swell roll through, but with weak energy (8 to 14) and short periods, there’s nothing to ride. The wind is mostly glassy or light offshore, which is nice for a paddle but not for a wave. Don’t get excited.
Then, on the morning of Tuesday, July 14th, we finally see a pulse of life. Swell hits 5ft from the north, with a 9-second period, and combined energy climbs to 386 (moderate). The wind is glassy from the southwest, so it’s clean. But the wave comment says “surfable waves but very ordinary conditions” – it’s a brief moment, not a classic.
The real standout, the only one worth marking on your calendar, is Sunday, July 19th. The morning brings 5ft of north swell with a 14-second period – that’s proper groundswell, long period, meaning better shaped waves but they’ll work best on a point like Ruby Bay. Combined energy is a solid 716 (strong). Wind is light offshore from the southwest, so it’ll be clean. Water temp is around 54°, which is about average for this time of year. The afternoon gets a bit bigger at 6ft, but the wind switches onshore from the north-northeast at 6 mph, making it choppy and only for the keen. Stick to the morning.
Monday, July 20th is still decent: 5ft in the morning from the north, 12-second period, light offshore wind, and combined energy of 546 (moderate-strong). The afternoon has 4ft with glassy conditions, so a solid follow-up day.
After that, from Tuesday, July 21st onward, the swell fades fast. The rest of the run into the 24th is tiny, weak, and not worth chasing. There’s a long flat gap from the 21st to the end of the outlook.
So, bottom line: Ruby Bay is a rare-break spot, and this window gives you just one true morning to aim for – Sunday, July 19th. The Monday morning is a good backup. Everything else is a flat spell. Crowds are possible here, but with so little on offer, you’ll likely have it to yourself.
Rusty.
Short Range ForecastMostly dry. Very mild (max 10°C on Fri afternoon, min 2°C on Thu night). Wind will be generally light. | Days 5-7 Weather SummaryLight rain (total 4mm), mostly falling on Mon night. Very mild (max 15°C on Tue afternoon, min 5°C on Sun night). Wind will be generally light. | ||||||||||||||||||||
Friday 10 | Saturday 11 | Sunday 12 | Monday 13 | Tuesday 14 | Wednesday 15 | Thu 16 | |||||||||||||||
Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | Night | AM | PM | |
Swell Height Map |  |  |  |  |  |  |  |  | |||||||||||||
Wave Height (m) Direction Period (s) | NE 4 | NW 18 | NW 16 | NW 16 | N 14 | NW 17 | NW 16 | NW 16 | NW 16 | NNW 2 | NNW 4 | NNW 5 | N 7 | N 8 | N 8 | N 18 | N 7 | NNW 16 | N 4 | NNW 15 | ENE 4 |
Wave Graph  | |||||||||||||||||||||
 kJ | 1 | 0 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 1 | 12 | 70 | 368 | 228 | 74 | 6 | 0 | 0 | 6 | 0 | 1 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | off | glassy | off | off | glassy | off | glassy | glassy | off | glassy | glassy | cross | off | glassy | off | glassy | glassy | glassy | off | glassy |
High Tide | 5:08AM3.55m | 5:51PM3.42m | 6:17AM3.58m | 7:17PM3.54m | 7:27AM3.68m | 8:31PM3.78m | 8:32AM3.83m | 9:28PM4.06m | 9:33AM3.98m | 10:17PM4.29m | 10:29AM4.09m | 11:02PM4.42m | 11:21AM4.15m | ||||||||
Low Tide | 10:53PM1.46m | 11:09AM1.37m | 00:08AM1.38m | 12:19PM1.34m | 1:13AM1.21m | 1:30PM1.24m | 2:13AM1.02m | 2:37PM1.08m | 3:10AM0.84m | 3:39PM0.90m | 4:03AM0.69m | 4:34PM0.75m | 4:53AM0.59m | 5:21PM0.68m | |||||||
 |  | | | | |  |  | | | | |  | | | | | | |  |  | |
 | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:50 | — | — | 7:48 | — | — | 7:48 | — |
 | — | — | 5:14 | — | — | 5:14 | — | — | 5:15 | — | — | 5:15 | — | — | 5:16 | — | — | 5:16 | — | — | 5:17 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | 4 | — | — | — | — | — | 3 | 7 | — |
Temp °C | 5 | 8 | 10 | 5 | 8 | 9 | 5 | 8 | 9 | 6 | 9 | 10 | 11 | 13 | 15 | 8 | 12 | 12 | 10 | 12 | 13 |
Feels °C | 2 | 5 | 8 | 2 | 6 | 6 | 2 | 6 | 7 | 4 | 8 | 9 | 8 | 12 | 14 | 5 | 11 | 10 | 9 | 11 | 12 |
Swell 1 Height (m) Direction Period (s) | NE 4 | NW 18 | NW 16 | NW 16 | NW 18 | NW 17 | NW 16 | NW 16 | NW 16 | — | N 4 | N 5 | — | N 8 | N 8 | N 7 | N 7 | N 5 | N 4 | NNW 6 | NNW 6 |
| kJ | 1 | 12 | 10 | 10 | 12 | 12 | 10 | 10 | 10 | — | 5 | 25 | — | 228 | 74 | 35 | 24 | 15 | 6 | 8 | 4 |
Swell 2 Height (m) Direction Period (s) | NW 19 | — | — | — | N 14 | — | — | — | — | NW 15 | N 15 | — | — | N 20 | N 14 | NNW 12 | NNW 16 | NNW 16 | NNW 15 | NNW 15 | NW 16 |
| kJ | 14 | — | — | — | 4 | — | — | — | — | 9 | 4 | — | — | 8 | 4 | 14 | 25 | 24 | 22 | 23 | 10 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 20 | N 18 | NW 12 | NW 20 | N 7 | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 15 | 6 | 6 | 15 | 4 | — | — |
Wind waves Height (m) Direction Period (s) | SSE 3 | — | — | — | — | — | — | — | — | NNW 2 | NNW 4 | NNW 5 | N 7 | — | — | — | — | — | — | — | ENE 4 |
| kJ | 2 | — | — | — | — | — | — | — | — | 1 | 12 | 70 | 368 | — | — | — | — | — | — | — | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 83 | 14 | 88 | 0 | 88 | 14 | 14 | 125 | 88 | 83 | 83 |
Best forecast wave conditions in Nelson - Tasman Bay | |||||||||||||||||||||
Best forecast wave conditions in New Zealand | |||||||||||||||||||||
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Information about the Ruby Bay Surf forecast
The above surf forecast table for Ruby Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Ruby Bay can be found by selecting the local surf guide option on the grey menu. Our Ruby Bay 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 (Ruby Bay) 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 Ruby Bay 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.
Are you planning a holiday in Nelson - Tasman Bay? If you are looking for accommodation near Ruby Bay, camping, hotels and holiday cottages in Nelson - Tasman Bay, consider staying in Nelson which is 17 km (11 miles) away. Alternatively, find information about places to stay and car hire in Blenheim which is 80 km (50 miles) away
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