YOUR COASTAL COMPANION
Harbour weather.
Your next passage.
Check the conditions. Plan your passage. Make more of the water.
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FORECAST FOR
St Peter Port
Channel IslandsFetching the forecast
Wind
Loading…Significant waves
Loading…Weather
Loading…Sea temperature
Loading…Barometric pressureSea-level model · Open-Meteo
Loading trend…Needs two model values exactly three hours apart
MODEL OUTLOOKLoading wind, weather and marine forecasts independently.
Hourly detail01 / Make a plan
Where are you heading?
From Guernsey
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Straight-line distance6.9 nm
Running time estimate23 min
St Peter PortSark
PASSAGE OVERVIEWStraight-line overview, not a navigational route.
At your departure port
Choose a time within the available forecast to see conditions.
Marina clearance & departure comparisons
Marina clearance
1.2 m draught + 0.5 m margin = 1.70 m required water depth.
Digimap predictions · QE2
Choose a departure date and time.
Estimated under-keel clearance · gates fully downChoose departure 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.
Compare departure hours
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.
Saved passages 0
Save a passage above to keep it here for next time.
Wind, waves & rain · UTC
The hours ahead
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.
Check the official forecast
A LITTLE TIME ASHORE
Ice cream & harbour stops
Find a treat, a table or supplies near St Peter Port.
Loading harbour listings…
Also in the local island guides
Tourism-guide listings are separate from the OpenStreetMap counts above.
Listings and opening hours may have changed. Check with the business before making a special trip. Distances do not establish walking access or a boat landing.
Beyond the forecast
Sea life & time on the water
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.
Importing observations…
Loading the published records and their observation dates.
Before you cast off
Five checks. Every passage.
Progress is saved here. Reset this checklist before each new departure.
Guernsey passage briefs
Know your crossing
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.
- Choose the route and tidal gate from a current pilot/chart
- Check wind against tide in the Swinge and Alderney Race
- Confirm Braye conditions and a realistic abort plan
Guernsey → Jersey
About 23nm straight-line
Strong streams, busy approaches and a tidally constrained arrival.
- Check the full passage against the day’s tidal predictions
- Use approved St Helier approaches and monitor VTS Ch 14
- Watch for rougher water when wind opposes the stream
Guernsey → Sark
About 7nm straight-line
Short crossing, but exposed moorings and strong local streams.
- Choose the lee-side visitor field for the forecast wind
- Yellow visitor buoys are first come, first served
- Creux dries; Maseline is drop-off only when operationally clear
Guernsey → Alderney: ReadyBoatGo deliberately does not give a generic “leave at X hours” rule. The safe gate changes with route, boat speed, wind, sea state and spring/neap cycle—use current charted tidal streams and local pilotage advice.
Visitor moorings
Sark & Alderney mooring finder
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.
Havre Gosselin
Yellow visitor buoys · west coast
Record spaces you can see
Official informationGréve de la Ville
Yellow visitor buoys · east coast
Record spaces you can see
Official informationCheck latest public AIS
Confirm before arriving
Use current charts and contact the harbour. Public AIS does not establish whether a visitor buoy is free.
THE LOCAL FILL-UP
Compare fuel within 5 km
Prices side by side near St Peter Port.
2 priced stations within 5 km · checking supplier pages…
| Fuel & basis | BoatworksCastle Emplacement≈ 0.4 km awayMap | BoatworksQE2 Marina≈ 0.5 km awayMap |
|---|---|---|
| DieselDuty-free red dieselGBP per litre | Comparable quote £1.20/L£120.00 for 100 L £2.00 more per fill Saved quote · Supplier page checked | Lowest listed £1.18/L£118.00 for 100 L Lowest cost for this fuel Saved quote · Supplier page checked |
| PetrolReduced-duty blue unleaded petrolGBP per litre | Comparable quote £1.64/L£164.00 for 100 L £2.00 more per fill Saved quote · Supplier page checked | Lowest listed £1.62/L£162.00 for 100 L Lowest cost for this fuel Saved quote · Supplier page checked |
“Lowest listed” compares at least two quotes checked within 24 hours, with the same fuel, currency and duty basis. Prices and access can change; confirm at the pump. Fill totals exclude fuel used getting there. Available price feeds: Boatworks and Cowes Harbour.
The 5 km filter uses approximate straight-line distances from the selected harbour to supplier map pins. Castle Emplacement location · QE2 Marina location
Your pump-price notes · St Peter Port
Saved on this device. These notes are not ranked because the station and duty basis are unconfirmed.
Harbour view
Nearby webcams
Check visibility and activity before departure.
Availability is controlled by each webcam operator and may change during maintenance.
THE BIGGER COASTAL PICTURE
What’s recorded in port?
Compare published service records by country or territory.
Loading the World Port Index summaries…
OFFICIAL STATION RECORDS
High & low water
Published NOAA predictions at nearby US stations.
Finding published stations…
KNOW WHAT YOU’RE LOOKING AT
Good plans start with clear sources.
Forecasts, not observations
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 & limitationsLocal detail has local coverage
Channel 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 evidencePrices are dated records
Boatworks 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 datesPrivacy & what stays on your device
Your 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.