YOUR COASTAL COMPANION
Check the conditions. Plan your passage. Make more of the water.
Channel Islands · Forecast times in UTC
AT YOUR HARBOUR
MODEL OUTLOOKLoading wind, weather and marine forecasts independently.
Hourly detail01 / Make a plan
Straight-line overview, not a navigational route.
Choose a time within the available forecast to see conditions.
1.2 m draught + 0.5 m margin = 1.70 m required water depth.
Choose a departure date and time.
Predictions do not confirm the live gate position or actual depth.
QE2 has dropping gates. Follow the entrance lights and check the marina gauge before crossing. Its fixed board reads above the raised gate; the lower sill is available only with the gates fully down. Neap tides can shorten access.
Tide predictions: Digimap · underlying data © Crown Copyright / UKHO.
The 24 hours after your selected departure, ranked by wind, waves and rain at the departure port.
No complete forecast hours in this window. Choose a nearer departure or check the official forecast.
Selecting an hour updates departure. Streams change through time and along the passage; this comparison does not assess the whole route or tidal gates.
Save a passage above to keep it here for next time.
Wind, waves & rain · UTC
Forecast at St Peter Port; conditions along your route will vary.
Comparison thresholds: raised at gusts ≥20 kn, waves ≥1.2 m or rain ≥60%; high at gusts ≥28 kn, waves ≥2 m or thunderstorms. These are not vessel-specific departure limits.
Beyond the forecast
Local observations, water conditions, coastal stops and the bigger boats around you.
Pins show where animals were reported on the recorded date. Animals move; these are historical observations.
Loading the published records and their observation dates.
Before you cast off
Progress is saved here. Reset this checklist before each new departure.
Guernsey passage briefs
Decision prompts only—not waypoints or turn-by-turn pilotage. Recalculate for your boat, crew, weather and the day’s tidal stream.
Guernsey → Alderney
About 21nm straight-line
Powerful tidal streams and very small timing margins.
Guernsey → Jersey
About 23nm straight-line
Strong streams, busy approaches and a tidally constrained arrival.
Guernsey → Sark
About 7nm straight-line
Short crossing, but exposed moorings and strong local streams.
Visitor moorings
Visitor fields and your own observations, saved on this device. Contact the harbour for current availability.
Approximate visitor fields. Use current charts and harbour instructions for buoy positions.
Yellow visitor buoys · west coast
Record spaces you can see
Official informationYellow visitor buoys · east coast
Record spaces you can see
Official informationConfirm before arriving
Use current charts and contact the harbour. Public AIS does not establish whether a visitor buoy is free.
Harbour view
Check visibility and activity before departure.
Availability is controlled by each webcam operator and may change during maintenance.
Marina fuel
Supplier prices and your own pump-price notes.
Diesel
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Petrol
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Compare recorded fuel prices
Price differences only: grades and duty bases can differ. Detour fuel is not deducted.
Diesel
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Petrol
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Boatworks prices come from its supplier page, checked hourly while this page is open. Cowes prices are supplier-published 60/40 diesel and E10 petrol. Elsewhere, save a dated note only after checking the pump. Always confirm price, grade, duty basis and pontoon access before fuelling.
THE BIGGER COASTAL PICTURE
Compare published service records by country or territory.
Loading the World Port Index summaries…
OFFICIAL STATION RECORDS
Published NOAA predictions at nearby US stations.
Finding published stations…
KNOW WHAT YOU’RE LOOKING AT
Wind, waves, pressure and sea temperature are Open-Meteo model estimates at your selected harbour. The page requests an update every 10 minutes while open; the retrieval time does not mean the model was just issued.
Model source & limitationsChannel Islands tools use dated wildlife reports, published water records and harbour sources. NOAA entries provide dated station predictions, not live gauge readings. World Port Index comparisons show recorded services by country or territory, not current availability at a particular berth.
Explore available local evidenceBoatworks checks run hourly while this page is open, with saved snapshots labelled when used. Cowes prices are a dated supplier snapshot. Your own fuel and mooring notes are personal observations, not availability guarantees.
Check prices & source datesYour passages, checklist, vessel profile and personal notes are saved in this browser. They are not an online account and do not sync between devices. Remove saved passages individually or reset the checklist in its section; clearing this site’s browser data removes all local records.
With your permission, your browser location is used on this device to find the nearest supported harbour. Forecast requests send that harbour’s coordinates to Open-Meteo. Destination searches are sent to Open-Meteo’s geocoding service; map tiles load from OpenStreetMap. These providers and the hosting service receive ordinary connection information such as your IP address. Following an external link opens the provider’s own site.
ReadyBoatGo does not add advertising or optional analytics scripts. Device storage supports the features you use. This description covers the current site functionality; it does not claim a legal compliance certification.