diff --git a/crates/rpc/rpc-eth-api/src/helpers/call.rs b/crates/rpc/rpc-eth-api/src/helpers/call.rs
index d37f0b5bb4..836ba3c495 100644
--- a/crates/rpc/rpc-eth-api/src/helpers/call.rs
+++ b/crates/rpc/rpc-eth-api/src/helpers/call.rs
@@ -97,8 +97,9 @@ pub trait EthCall: EstimateCall + Call + LoadPendingBlock + LoadBlock + FullEthA
                 let mut blocks: Vec<SimulatedBlock<RpcBlock<Self::NetworkTypes>>> =
                     Vec::with_capacity(block_state_calls.len());
 
-                // Track previous block number for validation
+                // Track previous block number and timestamp for validation
                 let mut prev_block_number = parent.number();
+                let mut prev_timestamp = parent.timestamp();
 
                 for block in block_state_calls {
                     // Validate block number ordering if overridden
@@ -112,6 +113,19 @@ pub trait EthCall: EstimateCall + Call + LoadPendingBlock + LoadBlock + FullEthA
                             .into());
                         }
                     }
+                    // Validate timestamp ordering if overridden
+                    if let Some(time) = block
+                        .block_overrides
+                        .as_ref()
+                        .and_then(|o| o.time)
+                        .filter(|&t| t <= prev_timestamp)
+                    {
+                        return Err(EthApiError::other(EthSimulateError::BlockTimestampInvalid {
+                            got: time,
+                            parent: prev_timestamp,
+                        })
+                        .into());
+                    }
 
                     let mut evm_env = this
                         .evm_config()
@@ -252,6 +266,7 @@ pub trait EthCall: EstimateCall + Call + LoadPendingBlock + LoadBlock + FullEthA
 
                     // Update tracking for next iteration's validation
                     prev_block_number = parent.number();
+                    prev_timestamp = parent.timestamp();
 
                     let block = simulate::build_simulated_block::<Self::Error, _>(
                         result.block,
diff --git a/crates/rpc/rpc-eth-types/src/simulate.rs b/crates/rpc/rpc-eth-types/src/simulate.rs
index 25b87bd1b2..c54e31d8a7 100644
--- a/crates/rpc/rpc-eth-types/src/simulate.rs
+++ b/crates/rpc/rpc-eth-types/src/simulate.rs
@@ -56,9 +56,14 @@ pub enum EthSimulateError {
         /// The parent block number.
         parent: u64,
     },
-    /// Block timestamp in sequence did not increase or stay the same.
-    #[error("Block timestamp in sequence did not increase")]
-    BlockTimestampInvalid,
+    /// Block timestamp in sequence did not increase.
+    #[error("block timestamps must be in order: {got} <= {parent}")]
+    BlockTimestampInvalid {
+        /// The block timestamp that was provided.
+        got: u64,
+        /// The parent block timestamp.
+        parent: u64,
+    },
     /// Transaction nonce is too low.
     #[error("nonce too low: next nonce {state}, tx nonce {tx}")]
     NonceTooLow {
@@ -112,7 +117,7 @@ impl EthSimulateError {
             Self::InsufficientFunds { .. } => -38014,
             Self::BlockGasLimitExceeded => -38015,
             Self::BlockNumberInvalid { .. } => -38020,
-            Self::BlockTimestampInvalid => -38021,
+            Self::BlockTimestampInvalid { .. } => -38021,
             Self::PrecompileSelfReference => -38022,
             Self::PrecompileDuplicateAddress => -38023,
             Self::SenderNotEOA => -38024,