Portsmouth, NH to Portland Harbor, ME map preview
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Portsmouth, NH to Portland Harbor, ME

Popular leg for cruisers heading into the Gulf of Maine.

Latest Automated Forecast

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Generated: 2026-04-29T10:53:46.378271+00:00 • Distance: 54.2 NM • Departure: 2026-04-29T08:00:00-04:00 • Speed: 6 knots
Historical Forecasts Download GPX File

Navigation Responsibility

This forecast is for informational purposes only. You are responsible for your own navigation and safety at sea. Always verify weather conditions with official sources, maintain a proper watch, and exercise prudent seamanship. Do not rely solely on this forecast for critical navigation decisions. See our Terms of Service for full details.