Deteriorating weather in the Tasman Sea
Unexpected Storm
in the Tasman Sea
West Coast, South Island · 19–20 February 2026 · Tasman Sea
The 19th of February delivered the kind of reminder the West Coast does best: things can go from manageable to demanding very quickly, and the sea doesn't negotiate. We were making south toward Milford Sound when the weather ahead of us stopped looking like a forecast and started looking like a fact.
The Decision
Two options, neither comfortable. Option one: 40 knots on the nose for the push into Milford Sound. Option two: turn and run 40 knots downwind into Tasman Bay. Milford was tempting — it's the destination, the whole point of being here. But 40 knots upwind on this coast is a long, punishing grind with very little margin. Hard on crew, hard on gear, and if something lets go you're in a bad place a long way from help.
Running downwind wasn't exactly relaxing either. At 40 knots the Southern Ocean swell is relentless — wave after wave lifting the stern, the boat accelerating down each face, the helm loaded and alive in your hands. But it was the lower-risk option with far more controllability, a cleaner escape route if the forecast kept deteriorating, and the weight of the sea working with us rather than against us. So we bore away, eased the sheets, and let Matariki find her stride. An Oyster 68 in these conditions is a reassuring thing — the displacement absorbs what the sea throws at her, and once the helm settled into the rhythm of the swell the boat felt purposeful rather than endangered. We were moving fast, and we were in control. That's the margin you need.
Downtime Well Used
Once we were tucked in and the boat was settled, we used the window properly. Not waiting — working. Three jobs that had been queued up by the passage north found their moment.
First up was Brendan, who pulled the steering hatch and disappeared into the lazarette for a thorough inspection of the steering system. This is the sort of job that is very easy to defer in fine weather and very hard to think about clearly when you're already in trouble. Satisfied with what he found, which is exactly the outcome you want.
On deck, Matt and Bruce spread the yankee out and got into the seam tape that had been lifting at the seam — the kind of small defect that starts as an annoyance and ends as a problem if you leave it long enough. Gloves on, adhesive out, two of them working methodically along the length of the sail in the sunshine. Tasman Bay turned out to be an excellent sail repair facility.
And then there was Bruce's danbuoy. Earlier in the passage, while landing his bigeye tuna off Cape Reinga, he'd managed to knock the inflatable danbuoy overboard in the excitement. Recovered, but needing a full repack and rearm before it could go back on the rail as a functioning piece of safety gear. Bruce spent the afternoon on the saloon floor with the canister disassembled around him — cordage, gas cartridge, fluorescent yellow fabric going in all directions — methodically working through the repack procedure. The danbuoy went back on the rail ready to deploy. Job done.
There is a particular satisfaction in arriving somewhere with the boat genuinely ready — not just functional, but attended to. The forecast improved on the 20th and we repositioned south when the window opened. The detour had cost us a day but gained us confidence in the boat and the crew, a tidy job list, and the knowledge that the decision made under pressure had been the right one. Milford Sound would wait. It always does.
When the forecast gives you two bad options, pick the one that preserves margin — for people first, then gear, then schedule. No hero moves on the West Coast of the South Island.
