StripedLines

Migration

6 posts on migration.

When do striped bass spawn? In spring, in rivers far south of here

The Science · October 6, 2026

Striped bass spawn in tidal fresh water in spring, from mid-April into May in the Chesapeake and from late April into June in the Hudson, as the rivers warm. The fish you catch in Massachusetts did it weeks earlier, hundreds of miles south, then swam here to feed.

5 min read

When do stripers leave Massachusetts? The fall run is the exit

The Science · September 24, 2026

Tagged striped bass left Massachusetts bays mostly in September and October, trickling out rather than leaving together. In Duxbury Bay, half were gone by the week the water averaged 62°F. The fall run is that exit, working slowly south on cooling water and shortening days.

5 min read

Where do striped bass go in the winter? Mostly south. Some stay.

The Science · September 24, 2026

Tagged stripers that summer in Massachusetts spend the winter far to the south, off Virginia and on the Maryland shelf, with North Carolina a known wintering ground. Not every fish goes. Some stay in their home rivers year-round, and a Maine river has a documented group that winters there.

5 min read

Is Saturday's fish still there on Tuesday?

The Science · August 26, 2026

Tagged striped bass stayed in one Massachusetts bay for 6 to 75 days. On a migration corridor off Maryland the same species averaged about two. Your spot is not holding a population of residents — it is holding a flow, and that changes what a good spot even means.

3 min read

The herring run is not a date. It is 9 degrees.

The Science · August 26, 2026

Alewife start running at about 9°C, and river herring runs are over by about 20–21°C. Across twelve Massachusetts streams the northern runs go later, warmer and in a narrower window than the southern ones — so a single statewide date is wrong by construction.

3 min read

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