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For the quest, see The Glowing Sea.

The Glowing Sea is the most highly irradiated region in the entire Commonwealth. According to local legend, it was ground zero for the high-yield nuclear blast that devastated most of Massachusetts.Fallout 4 loading screen hint

The Glowing Sea is a region of the Commonwealth in Fallout 4 that contains several locations. As a whole, the Glowing Sea is the single largest highly irradiated area as a result of a single nuclear device included in any of the Fallout series.[1]


Originally the communities southwest of Boston proper, the area was ground zero of a massive nuclear detonation during the Great War. The Glowing Sea itself is a dangerously irradiated hotspot, with above-average radiation levels throughout its territory. It is located where the southern freeway connected to Mass Pike Interchange ends. This area was where the atomic bomb struck in 2077. It is not technically a "sea" but rather a large isolated patch of heavily irradiated landscape, ripped up and reshaped by the atomic blasts that carpeted the area. Much of the Glowing Sea consists of scorched earth spotted with radioactive ponds, charred trees, wrecked cars and heaps of rubble. What few buildings remain that weren't outright reduced to thinly-spread debris are half-buried by landslides and sinkholes caused by the bombs. Rain clouds that pass over the Glowing Sea become irradiated and spread radiation into other parts of the Commonwealth wasteland in the form of rad storms.[2]

Despite all these dangers and more, the Glowing Sea does harbor life, including humans. At the center of the Glowing Sea is a settlement known as the Crater of Atom, inhabited by humans from the Church of the Children of Atom. The sickly greenish-yellow glow emitting from the crater can be seen from far across the Commonwealth. Southwest of the Glowing Sea, outside the boundaries of the map, is also the rocky cave, inhabited by Virgil.


The Glowing Sea is extremely dangerous and should not be explored at a low level or without adequate supplies and protection. The entirety of the Glowing Sea is heavily irradiated, normally causing at least 10+ Rads a second in most areas (60+ when standing in water), killing unprotected players in less than two minutes. To survive, one should bring along an ample supply of RadAway and Rad-X to minimize exposure. Further protection can be achieved by wearing rad-resistant armor, such as power armor or a hazmat suit (though the power armor gives better protection from enemy attacks). Completing the Cabot House questline by siding with Lorenzo Cabot, grants unlimited Mysterious serum - that heals 10 Rads per second for an hour.

More dangerous than the radiation is the local wildlife, as only the hardiest creatures can survive here: packs of deathclaws, radscorpions, and mutant insects such as bloatflies, bloodbugs and stingwings roam the wastes attacking anything in their path. Useful resources (food, chems, ammo, etc) are scarce in the open wastes of the Glowing Sea, although the various ruins and wrecked vehicles scattered about the area contain modest amounts of loot. These ruins hold their own dangers, however; namely in the form of large packs of feral ghouls and the occasional mole rat swarm.


Notable loot


The Glowing Sea appears only in Fallout 4.



  1. Fallout 4 Vault Dweller's Survival Guide Collector's Edition pp. 353-354: "ZONE 5: NATICK AND THE GLOWING SEA
    Complete and utter desolation as far as your blistered, irradiated eyes can see. A perpetual cloud of radiation haze. Fierce and toxic storms. If the Deathclaws and Radscorpions don't get you, the radiation sickness might. This is the epicenter of a massive (and highly successful) nuclear strike centered on what is known colloquially as the Crater of Atom. While the northern and riverside fringes of this zone are relatively free of radiation, be sure to stock up on chems and wear proper protective attire once you're south of Natick. Welcome to the Glowing Sea."
    (Fallout 4 Vault Dweller's Survival Guide Map)
  2. Todd Howard panel, E3 2015 [1]