diff --git a/PKHeX.Core/Legality/Structures/EncounterArea.cs b/PKHeX.Core/Legality/Structures/EncounterArea.cs
index 669f30311..26c0151d3 100644
--- a/PKHeX.Core/Legality/Structures/EncounterArea.cs
+++ b/PKHeX.Core/Legality/Structures/EncounterArea.cs
@@ -615,7 +615,7 @@ private static EncounterSlot1[] readSlots(byte[] data, ref int ofs, int count, S
 
                 slots[i] = new EncounterSlot1
                 {
-                    LevelMax = lvl,
+                    LevelMax = t == SlotType.Surf ? lvl + 4 : lvl,
                     LevelMin = lvl,
                     Species = spec,
                     Type = t,