Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived.

Model-derived from a global ocean grid. Useful indication; expect about ±45 minutes on average vs. a local harmonic gauge, individual stations vary widely. See /methodology for per-region detail. Not for navigation.

Conditions as of 02:00 local time. Refreshes daily.

Predictions: Open-Meteo Marine (MeteoFrance SMOC, 0.08° grid) — heights relative to MSL (not chart datum / LAT). Model-derived. · Not for navigation.

The angler tradition that rates each day for fish-bite likelihood using moon transits and rise/set. One to five stars, not a scientific forecast.

• Tue
  ★★★★★
• Wed
  ★★★★★
• Thu
  ★★★★★
• Fri
  ★★★★★
• Sat
  ★★★★★
• Sun
  ★★★★★
• Mon
  ★★★★★

Next spring tide on Sun 03 May (range 0.8m). Next neap on Wed 29 Apr.

Spring tides cluster around new and full moons (biggest swings). Neap tides land on quarter moons (smallest swings). See the spring tide and neap tide glossary entries for the why.

Hobart sits on the Derwent estuary on Tasmania's south-eastern coast, with the open Tasman Sea reaching in through Storm Bay and the deep water of the lower Derwent rising to a working harbour at Sullivans Cove. The tide signature here is mixed semidiurnal, two highs and two lows of unequal size each day, the bigger swing falling on the lower-low water. Mean range at the lower Derwent gauge is about 1.0 metre, climbing past 1.4 on spring tides and dropping near 0.6 on neaps. The pattern is the open Tasman Sea signal modulated by the Derwent's funnel geometry — the upper estuary at New Norfolk runs slightly larger swings than the lower harbour at Constitution Dock because the channel narrows as you move upstream, while the timing lags the lower harbour by about 30 minutes. The north Tasmanian coast at Devonport and Burnie runs a different and larger signal — Bass Strait amplifies the open Tasman Sea forcing and produces ranges close to 2.5 metres on springs there. The wild west coast at Strahan and Macquarie Harbour runs an open-ocean pattern modulated by the long fjord-like Hells Gates entrance. The Derwent at Hobart is a working harbour and the tide changes the day for sailors leaving Constitution Dock for the Sydney-Hobart, fishers off the Tasman Peninsula sea cliffs, walkers on the long sand beaches at Seven Mile and Clifton, and rowers on the upper Derwent. Roaring-Forties storm surge in winter can lift levels 20 to 30 cm above predicted. Open-Meteo Marine drives the gridded predictions on this page; the Australian Bureau of Meteorology and Maritime Safety Tasmania publish the authoritative tide tables.